diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index b0ebb90e..5539cec9 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -25,7 +25,7 @@ jobs:
     steps:
     -
       name: Checkout repository
-      uses: actions/checkout@v3.1.0
+      uses: actions/checkout@v3.3.0
     # Initializes the CodeQL tools for scanning.
     -
       name: Initialize CodeQL
diff --git a/.github/workflows/merge-conflict.yml b/.github/workflows/merge-conflict.yml
index 5674fca1..d86e9cd1 100644
--- a/.github/workflows/merge-conflict.yml
+++ b/.github/workflows/merge-conflict.yml
@@ -18,4 +18,4 @@ jobs:
           dirtyLabel: "PR: Merge Conflict"
           repoToken: "${{ secrets.GITHUB_TOKEN }}"
           commentOnDirty: "This pull request has conflicts, please resolve those before we can evaluate the pull request."
-          commentOnClean: "Conflicts have been resolved. A maintainer will review the pull request shortly."
+          commentOnClean: "Conflicts have been resolved."
diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
index a17d5a94..58a2e647 100644
--- a/.github/workflows/stale.yml
+++ b/.github/workflows/stale.yml
@@ -13,7 +13,7 @@ jobs:
       issues: write
 
     steps:
-      - uses: actions/stale@v6.0.1
+      - uses: actions/stale@v7.0.0
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
           days-before-stale: 30
diff --git a/.github/workflows/sync-back-to-dev.yml b/.github/workflows/sync-back-to-dev.yml
index 3a5133f9..89b6323f 100644
--- a/.github/workflows/sync-back-to-dev.yml
+++ b/.github/workflows/sync-back-to-dev.yml
@@ -11,7 +11,7 @@ jobs:
     name: Syncing branches
     steps:
       - name: Checkout
-        uses: actions/checkout@v3.1.0
+        uses: actions/checkout@v3.3.0
       - name: Opening pull request
         run: gh pr create -B development -H master --title 'Sync master back into development' --body 'Created by Github action' --label 'internal'
         env:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index daa18c85..cf84a28a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3.1.0
+        uses: actions/checkout@v3.3.0
 
       - name: Check scripts in repository are executable
         run: |
@@ -57,18 +57,22 @@ jobs:
             centos_9,
             fedora_35,
             fedora_36,
+            fedora_37,
           ]
     env:
       DISTRO: ${{matrix.distro}}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3.1.0
+        uses: actions/checkout@v3.3.0
 
       - name: Set up Python 3.10
-        uses: actions/setup-python@v4.3.0
+        uses: actions/setup-python@v4.5.0
         with:
           python-version: "3.10"
 
+      - name: Install wheel
+        run:  pip install wheel
+
       - name: Install dependencies
         run: pip install -r test/requirements.txt
 
diff --git a/advanced/Scripts/piholeDebug.sh b/advanced/Scripts/piholeDebug.sh
index 3cd782bf..c0264d1a 100755
--- a/advanced/Scripts/piholeDebug.sh
+++ b/advanced/Scripts/piholeDebug.sh
@@ -394,41 +394,53 @@ os_check() {
     # Extract dig response
     response="${cmdResult%%$'\n'*}"
 
-    IFS=" " read -r -a supportedOS < <(echo "${response}" | tr -d '"')
-    for distro_and_versions in "${supportedOS[@]}"
-    do
-        distro_part="${distro_and_versions%%=*}"
-        versions_part="${distro_and_versions##*=}"
-
-        if [[ "${detected_os^^}" =~ ${distro_part^^} ]]; then
-            valid_os=true
-            IFS="," read -r -a supportedVer <<<"${versions_part}"
-            for version in "${supportedVer[@]}"
-            do
-                if [[ "${detected_version}" =~ $version ]]; then
-                    valid_version=true
-                    break
-                fi
-            done
-            break
-        fi
-    done
-
-    log_write "${INFO} dig return code:  ${digReturnCode}"
-    log_write "${INFO} dig response:  ${response}"
-
-    if [ "$valid_os" = true ]; then
-        log_write "${TICK} Distro:  ${COL_GREEN}${detected_os^}${COL_NC}"
-
-        if [ "$valid_version" = true ]; then
-            log_write "${TICK} Version: ${COL_GREEN}${detected_version}${COL_NC}"
-        else
-            log_write "${CROSS} Version: ${COL_RED}${detected_version}${COL_NC}"
-            log_write "${CROSS} Error: ${COL_RED}${detected_os^} is supported but version ${detected_version} is currently unsupported (${FAQ_HARDWARE_REQUIREMENTS})${COL_NC}"
-        fi
+    if [ "${digReturnCode}" -ne 0 ]; then
+        log_write "${INFO} Distro: ${detected_os^}"
+        log_write "${INFO} Version: ${detected_version}"
+        log_write "${CROSS} dig return code: ${COL_RED}${digReturnCode}${COL_NC}"
+        log_write "${CROSS} dig response: ${response}"
+        log_write "${CROSS} Error: ${COL_RED}dig command failed - Unable to check OS${COL_NC}"
     else
-        log_write "${CROSS} Distro:  ${COL_RED}${detected_os^}${COL_NC}"
-        log_write "${CROSS} Error: ${COL_RED}${detected_os^} is not a supported distro (${FAQ_HARDWARE_REQUIREMENTS})${COL_NC}"
+        IFS=" " read -r -a supportedOS < <(echo "${response}" | tr -d '"')
+        for distro_and_versions in "${supportedOS[@]}"
+        do
+            distro_part="${distro_and_versions%%=*}"
+            versions_part="${distro_and_versions##*=}"
+
+            if [[ "${detected_os^^}" =~ ${distro_part^^} ]]; then
+                valid_os=true
+                IFS="," read -r -a supportedVer <<<"${versions_part}"
+                for version in "${supportedVer[@]}"
+                do
+                    if [[ "${detected_version}" =~ $version ]]; then
+                        valid_version=true
+                        break
+                    fi
+                done
+                break
+            fi
+        done
+
+        local finalmsg
+        if [ "$valid_os" = true ]; then
+            log_write "${TICK} Distro:  ${COL_GREEN}${detected_os^}${COL_NC}"
+
+            if [ "$valid_version" = true ]; then
+                log_write "${TICK} Version: ${COL_GREEN}${detected_version}${COL_NC}"
+                finalmsg="${TICK} ${COL_GREEN}Distro and version supported${COL_NC}"
+            else
+                log_write "${CROSS} Version: ${COL_RED}${detected_version}${COL_NC}"
+                finalmsg="${CROSS} Error: ${COL_RED}${detected_os^} is supported but version ${detected_version} is currently unsupported ${COL_NC}(${FAQ_HARDWARE_REQUIREMENTS})${COL_NC}"
+            fi
+        else
+            log_write "${CROSS} Distro:  ${COL_RED}${detected_os^}${COL_NC}"
+            finalmsg="${CROSS} Error: ${COL_RED}${detected_os^} is not a supported distro ${COL_NC}(${FAQ_HARDWARE_REQUIREMENTS})${COL_NC}"
+        fi
+
+        # Print dig response and the final check result
+        log_write "${TICK} dig return code: ${COL_GREEN}${digReturnCode}${COL_NC}"
+        log_write "${INFO} dig response: ${response}"
+        log_write "${finalmsg}"
     fi
 }
 
diff --git a/advanced/Scripts/query.sh b/advanced/Scripts/query.sh
index ae266ec0..d48e9363 100755
--- a/advanced/Scripts/query.sh
+++ b/advanced/Scripts/query.sh
@@ -77,7 +77,7 @@ fi
 
 # Strip valid options, leaving only the domain and invalid options
 # This allows users to place the options before or after the domain
-options=$(sed -E 's/ ?-(adlists?|all|exact) ?//g' <<< "${options}")
+options=$(sed -E 's/ ?-(all|exact) ?//g' <<< "${options}")
 
 # Handle remaining options
 # If $options contain non ASCII characters, convert to punycode
diff --git a/advanced/Templates/pihole-FTL-poststop.sh b/advanced/Templates/pihole-FTL-poststop.sh
new file mode 100755
index 00000000..ac3898d2
--- /dev/null
+++ b/advanced/Templates/pihole-FTL-poststop.sh
@@ -0,0 +1,13 @@
+#!/usr/bin/env sh
+
+# Source utils.sh for getFTLPIDFile()
+PI_HOLE_SCRIPT_DIR='/opt/pihole'
+utilsfile="${PI_HOLE_SCRIPT_DIR}/utils.sh"
+# shellcheck disable=SC1090
+. "${utilsfile}"
+
+# Get file paths
+FTL_PID_FILE="$(getFTLPIDFile)"
+
+# Cleanup
+rm -f /run/pihole/FTL.sock /dev/shm/FTL-* "${FTL_PID_FILE}"
diff --git a/advanced/Templates/pihole-FTL-prestart.sh b/advanced/Templates/pihole-FTL-prestart.sh
new file mode 100755
index 00000000..ff4abf3a
--- /dev/null
+++ b/advanced/Templates/pihole-FTL-prestart.sh
@@ -0,0 +1,38 @@
+#!/usr/bin/env sh
+
+# Source utils.sh for getFTLPIDFile()
+PI_HOLE_SCRIPT_DIR='/opt/pihole'
+utilsfile="${PI_HOLE_SCRIPT_DIR}/utils.sh"
+# shellcheck disable=SC1090
+. "${utilsfile}"
+
+# Get file paths
+FTL_PID_FILE="$(getFTLPIDFile)"
+
+# Touch files to ensure they exist (create if non-existing, preserve if existing)
+# shellcheck disable=SC2174
+mkdir -pm 0755 /run/pihole /var/log/pihole
+[ -f "${FTL_PID_FILE}" ] || install -D -m 644 -o pihole -g pihole /dev/null "${FTL_PID_FILE}"
+[ -f /var/log/pihole/FTL.log ] || install -m 644 -o pihole -g pihole /dev/null /var/log/pihole/FTL.log
+[ -f /var/log/pihole/pihole.log ] || install -m 640 -o pihole -g pihole /dev/null /var/log/pihole/pihole.log
+[ -f /etc/pihole/dhcp.leases ] || install -m 644 -o pihole -g pihole /dev/null /etc/pihole/dhcp.leases
+# Ensure that permissions are set so that pihole-FTL can edit all necessary files
+chown pihole:pihole /run/pihole /etc/pihole /var/log/pihole /var/log/pihole/FTL.log /var/log/pihole/pihole.log /etc/pihole/dhcp.leases
+# Ensure that permissions are set so that pihole-FTL can edit the files. We ignore errors as the file may not (yet) exist
+chmod -f 0644 /etc/pihole/macvendor.db /etc/pihole/dhcp.leases /var/log/pihole/FTL.log
+chmod -f 0640 /var/log/pihole/pihole.log
+# Chown database files to the user FTL runs as. We ignore errors as the files may not (yet) exist
+chown -f pihole:pihole /etc/pihole/pihole-FTL.db /etc/pihole/gravity.db /etc/pihole/macvendor.db
+# Chmod database file permissions so that the pihole group (web interface) can edit the file. We ignore errors as the files may not (yet) exist
+chmod -f 0664 /etc/pihole/pihole-FTL.db
+
+# Backward compatibility for user-scripts that still expect log files in /var/log instead of /var/log/pihole
+# Should be removed with Pi-hole v6.0
+if [ ! -f /var/log/pihole.log ]; then
+    ln -sf /var/log/pihole/pihole.log /var/log/pihole.log
+    chown -h pihole:pihole /var/log/pihole.log
+fi
+if [ ! -f /var/log/pihole-FTL.log ]; then
+    ln -sf /var/log/pihole/FTL.log /var/log/pihole-FTL.log
+    chown -h pihole:pihole /var/log/pihole-FTL.log
+fi
diff --git a/advanced/Templates/pihole-FTL.service b/advanced/Templates/pihole-FTL.service
index bc1b1d20..15096972 100644
--- a/advanced/Templates/pihole-FTL.service
+++ b/advanced/Templates/pihole-FTL.service
@@ -9,9 +9,10 @@
 # Description:       Enable service provided by pihole-FTL daemon
 ### END INIT INFO
 
-#source utils.sh for getFTLPIDFile(), getFTLPID ()
+# Source utils.sh for getFTLPIDFile(), getFTLPID()
 PI_HOLE_SCRIPT_DIR="/opt/pihole"
 utilsfile="${PI_HOLE_SCRIPT_DIR}/utils.sh"
+# shellcheck disable=SC1090
 . "${utilsfile}"
 
 
@@ -28,33 +29,8 @@ start() {
   if is_running; then
     echo "pihole-FTL is already running"
   else
-    # Touch files to ensure they exist (create if non-existing, preserve if existing)
-    mkdir -pm 0755 /run/pihole /var/log/pihole
-    [ ! -f "${FTL_PID_FILE}" ] && install -D -m 644 -o pihole -g pihole /dev/null "${FTL_PID_FILE}"
-    [ ! -f /var/log/pihole/FTL.log ] && install -m 644 -o pihole -g pihole /dev/null /var/log/pihole/FTL.log
-    [ ! -f /var/log/pihole/pihole.log ] && install -m 640 -o pihole -g pihole /dev/null /var/log/pihole/pihole.log
-    [ ! -f /etc/pihole/dhcp.leases ] && install -m 644 -o pihole -g pihole /dev/null /etc/pihole/dhcp.leases
-    # Ensure that permissions are set so that pihole-FTL can edit all necessary files
-    chown pihole:pihole /run/pihole /etc/pihole /var/log/pihole /var/log/pihole/FTL.log /var/log/pihole/pihole.log /etc/pihole/dhcp.leases
-    # Ensure that permissions are set so that pihole-FTL can edit the files. We ignore errors as the file may not (yet) exist
-    chmod -f 0644 /etc/pihole/macvendor.db /etc/pihole/dhcp.leases /var/log/pihole/FTL.log
-    chmod -f 0640 /var/log/pihole/pihole.log
-    # Chown database files to the user FTL runs as. We ignore errors as the files may not (yet) exist
-    chown -f pihole:pihole /etc/pihole/pihole-FTL.db /etc/pihole/gravity.db /etc/pihole/macvendor.db
-    # Chown database file permissions so that the pihole group (web interface) can edit the file. We ignore errors as the files may not (yet) exist
-    chmod -f 0664 /etc/pihole/pihole-FTL.db
-
-    # Backward compatibility for user-scripts that still expect log files in /var/log instead of /var/log/pihole/
-    # Should be removed with Pi-hole v6.0
-    if [ ! -f /var/log/pihole.log ]; then
-        ln -s /var/log/pihole/pihole.log /var/log/pihole.log
-        chown -h pihole:pihole /var/log/pihole.log
-
-    fi
-    if [ ! -f /var/log/pihole-FTL.log ]; then
-        ln -s /var/log/pihole/FTL.log /var/log/pihole-FTL.log
-        chown -h pihole:pihole /var/log/pihole-FTL.log
-    fi
+    # Run pre-start script, which pre-creates all expected files with correct permissions
+    sh "${PI_HOLE_SCRIPT_DIR}/pihole-FTL-prestart.sh"
 
     if setcap CAP_NET_BIND_SERVICE,CAP_NET_RAW,CAP_NET_ADMIN,CAP_SYS_NICE,CAP_IPC_LOCK,CAP_CHOWN+eip "/usr/bin/pihole-FTL"; then
       su -s /bin/sh -c "/usr/bin/pihole-FTL" pihole || exit $?
@@ -89,8 +65,8 @@ stop() {
   else
     echo "Not running"
   fi
-  # Cleanup
-  rm -f /run/pihole/FTL.sock /dev/shm/FTL-* "${FTL_PID_FILE}"
+  # Run post-stop script, which does cleanup among runtime files
+  sh "${PI_HOLE_SCRIPT_DIR}/pihole-FTL-poststop.sh"
   echo
 }
 
@@ -108,11 +84,11 @@ status() {
 
 ### main logic ###
 
-# Get file paths
+# Get FTL's PID file path
 FTL_PID_FILE="$(getFTLPIDFile)"
 
 # Get FTL's current PID
-FTL_PID="$(getFTLPID ${FTL_PID_FILE})"
+FTL_PID="$(getFTLPID "${FTL_PID_FILE}")"
 
 case "$1" in
   stop)
diff --git a/advanced/Templates/pihole-FTL.systemd b/advanced/Templates/pihole-FTL.systemd
new file mode 100644
index 00000000..2a114199
--- /dev/null
+++ b/advanced/Templates/pihole-FTL.systemd
@@ -0,0 +1,41 @@
+[Unit]
+Description=Pi-hole FTL
+# This unit is supposed to indicate when network functionality is available, but it is only
+# very weakly defined what that is supposed to mean, with one exception: at shutdown, a unit
+# that is ordered after network-online.target will be stopped before the network
+Wants=network-online.target
+After=network-online.target
+# A target that should be used as synchronization point for all host/network name service lookups.
+# All services for which the availability of full host/network name resolution is essential should
+# be ordered after this target, but not pull it in.
+Wants=nss-lookup.target
+Before=nss-lookup.target
+
+# Limit (re)start loop to 5 within 1 minute
+StartLimitBurst=5
+StartLimitIntervalSec=60s
+
+[Service]
+User=pihole
+PermissionsStartOnly=true
+AmbientCapabilities=CAP_NET_BIND_SERVICE CAP_NET_RAW CAP_NET_ADMIN CAP_SYS_NICE CAP_IPC_LOCK CAP_CHOWN
+
+ExecStartPre=/opt/pihole/pihole-FTL-prestart.sh
+ExecStart=/usr/bin/pihole-FTL -f
+Restart=on-failure
+RestartSec=5s
+ExecReload=/bin/kill -HUP $MAINPID
+ExecStopPost=/opt/pihole/pihole-FTL-poststop.sh
+
+# Use graceful shutdown with a reasonable timeout
+TimeoutStopSec=10s
+
+# Make /usr, /boot, /etc and possibly some more folders read-only...
+ProtectSystem=full
+# ... except /etc/pihole
+# This merely retains r/w access rights, it does not add any new.
+# Must still be writable on the host!
+ReadWriteDirectories=/etc/pihole
+
+[Install]
+WantedBy=multi-user.target
diff --git a/advanced/index.php b/advanced/index.php
deleted file mode 100644
index f3f2ce1c..00000000
--- a/advanced/index.php
+++ /dev/null
@@ -1,81 +0,0 @@
-<?php
-/* Pi-hole: A black hole for Internet advertisements
-*  (c) 2017 Pi-hole, LLC (https://pi-hole.net)
-*  Network-wide ad blocking via your own hardware.
-*
-*  This file is copyright under the latest version of the EUPL.
-*  Please see LICENSE file for your rights under this license. */
-
-// Sanitize SERVER_NAME output
-$serverName = htmlspecialchars($_SERVER["SERVER_NAME"]);
-// Remove external ipv6 brackets if any
-$serverName = preg_replace('/^\[(.*)\]$/', '${1}', $serverName);
-
-// Set landing page location, found within /var/www/html/
-$landPage = "../landing.php";
-
-// Define array for hostnames to be accepted as self address for splash page
-$authorizedHosts = [ "localhost" ];
-if (!empty($_SERVER["FQDN"])) {
-    // If setenv.add-environment = ("fqdn" => "true") is configured in lighttpd,
-    // append $serverName to $authorizedHosts
-    array_push($authorizedHosts, $serverName);
-} else if (!empty($_SERVER["VIRTUAL_HOST"])) {
-    // Append virtual hostname to $authorizedHosts
-    array_push($authorizedHosts, $_SERVER["VIRTUAL_HOST"]);
-}
-
-// Determine block page type
-if ($serverName === "pi.hole"
-    || (!empty($_SERVER["VIRTUAL_HOST"]) && $serverName === $_SERVER["VIRTUAL_HOST"])) {
-    // Redirect to Web Interface
-    header("Location: /admin");
-    exit();
-} elseif (filter_var($serverName, FILTER_VALIDATE_IP) || in_array($serverName, $authorizedHosts)) {
-    // When directly browsing via IP or authorized hostname
-    // Render splash/landing page based off presence of $landPage file
-    // Unset variables so as to not be included in $landPage or $splashPage
-    unset($authorizedHosts);
-    // If $landPage file is present
-    if (is_file(getcwd()."/$landPage")) {
-        unset($serverName, $viewPort); // unset extra variables not to be included in $landpage
-        include $landPage;
-        exit();
-    }
-    // If $landPage file was not present, Set Splash Page output
-    $splashPage = <<<EOT
-    <!doctype html>
-    <html lang='en'>
-        <head>
-            <meta charset='utf-8'>
-            <meta name='viewport' content='width=device-width, initial-scale=1'>
-            <title>● $serverName</title>
-            <link rel='shortcut icon' href='/admin/img/favicons/favicon.ico' type='image/x-icon'>
-            <style>
-                html, body { height: 100% }
-                body { margin: 0; font: 13pt "Source Sans Pro", "Helvetica Neue", Helvetica, Arial, sans-serif; }
-                body { background: #222; color: rgba(255, 255, 255, 0.7); text-align: center; }
-                p { margin: 0; }
-                a { color: #3c8dbc; text-decoration: none; }
-                a:hover { color: #72afda; text-decoration: underline; }
-                #splashpage { display: flex; align-items: center; justify-content: center; }
-                #splashpage img { margin: 5px; width: 256px; }
-                #splashpage b { color: inherit; }
-            </style>
-        </head>
-        <body id='splashpage'>
-            <div>
-            <img src='/admin/img/logo.svg' alt='Pi-hole logo' width='256' height='377'>
-            <br>
-            <p>Pi-<strong>hole</strong>: Your black hole for Internet advertisements</p>
-            <a href='/admin'>Did you mean to go to the admin panel?</a>
-            </div>
-        </body>
-    </html>
-EOT;
-    exit($splashPage);
-}
-
-header("HTTP/1.1 404 Not Found");
-exit();
-?>
diff --git a/advanced/lighttpd.conf.debian b/advanced/lighttpd.conf.debian
index 21e48d6c..06c284fe 100644
--- a/advanced/lighttpd.conf.debian
+++ b/advanced/lighttpd.conf.debian
@@ -26,7 +26,6 @@ server.modules = (
 )
 
 server.document-root        = "/var/www/html"
-server.error-handler-404    = "/pihole/index.php"
 server.upload-dirs          = ( "/var/cache/lighttpd/uploads" )
 server.errorlog             = "/var/log/lighttpd/error-pihole.log"
 server.pid-file             = "/run/lighttpd.pid"
@@ -67,48 +66,9 @@ mimetype.assign = (
     ".woff2" => "font/woff2"
 )
 
-# Add user chosen options held in external file
-# This uses include_shell instead of an include wildcard for compatibility
-include_shell "cat external.conf 2>/dev/null"
+# Add user chosen options held in (optional) external file
+include "external*.conf"
 
 # default listening port for IPv6 falls back to the IPv4 port
 include_shell "/usr/share/lighttpd/use-ipv6.pl " + server.port
-
-# Prevent Lighttpd from enabling Let's Encrypt SSL for every blocked domain
-#include_shell "/usr/share/lighttpd/include-conf-enabled.pl"
-include_shell "find /etc/lighttpd/conf-enabled -name '*.conf' -a ! -name 'letsencrypt.conf' -printf 'include \"%p\"\n' 2>/dev/null"
-
-# If the URL starts with /admin, it is the Web interface
-$HTTP["url"] =~ "^/admin/" {
-    # X-Pi-hole is a response header for debugging using curl -I
-    # X-Frame-Options prevents clickjacking attacks and helps ensure your content is not embedded into other sites via < frame >, < iframe > or < object >.
-    # X-XSS-Protection sets the configuration for the cross-site scripting filters built into most browsers. This is important because it tells the browser to block the response if a malicious script has been inserted from a user input.
-    # X-Content-Type-Options stops a browser from trying to MIME-sniff the content type and forces it to stick with the declared content-type. This is important because the browser will only load external resources if their content-type matches what is expected, and not malicious hidden code.
-    # Content-Security-Policy tells the browser where resources are allowed to be loaded and if it’s allowed to parse/run inline styles or Javascript. This is important because it prevents content injection attacks, such as Cross Site Scripting (XSS).
-    # X-Permitted-Cross-Domain-Policies is an XML document that grants a web client, such as Adobe Flash Player or Adobe Acrobat (though not necessarily limited to these), permission to handle data across domains.
-    # Referrer-Policy allows control/restriction of the amount of information present in the referral header for links away from your page—the URL path or even if the header is sent at all.
-    setenv.add-response-header = (
-        "X-Pi-hole" => "The Pi-hole Web interface is working!",
-        "X-Frame-Options" => "DENY",
-        "X-XSS-Protection" => "1; mode=block",
-        "X-Content-Type-Options" => "nosniff",
-        "Content-Security-Policy" => "default-src 'self' 'unsafe-inline';",
-        "X-Permitted-Cross-Domain-Policies" => "none",
-        "Referrer-Policy" => "same-origin"
-    )
-}
-
-# Block . files from being served, such as .git, .github, .gitignore
-$HTTP["url"] =~ "^/admin/\.(.*)" {
-    url.access-deny = ("")
-}
-
-# allow teleporter and API qr code iframe on settings page
-$HTTP["url"] =~ "/(teleporter|api_token)\.php$" {
-    $HTTP["referer"] =~ "/admin/settings\.php" {
-        setenv.add-response-header = ( "X-Frame-Options" => "SAMEORIGIN" )
-    }
-}
-
-# Default expire header
-expire.url = ( "" => "access plus 0 seconds" )
+include "/etc/lighttpd/conf-enabled/*.conf"
diff --git a/advanced/lighttpd.conf.fedora b/advanced/lighttpd.conf.fedora
index 3da62839..04f3ee01 100644
--- a/advanced/lighttpd.conf.fedora
+++ b/advanced/lighttpd.conf.fedora
@@ -27,7 +27,6 @@ server.modules = (
 )
 
 server.document-root        = "/var/www/html"
-server.error-handler-404    = "/pihole/index.php"
 server.upload-dirs          = ( "/var/cache/lighttpd/uploads" )
 server.errorlog             = "/var/log/lighttpd/error-pihole.log"
 server.pid-file             = "/run/lighttpd.pid"
@@ -68,9 +67,8 @@ mimetype.assign = (
     ".woff2" => "font/woff2"
 )
 
-# Add user chosen options held in external file
-# This uses include_shell instead of an include wildcard for compatibility
-include_shell "cat external.conf 2>/dev/null"
+# Add user chosen options held in (optional) external file
+include "external*.conf"
 
 # default listening port for IPv6 falls back to the IPv4 port
 #include_shell "/usr/share/lighttpd/use-ipv6.pl " + server.port
@@ -86,37 +84,4 @@ fastcgi.server = (
     )
 )
 
-# If the URL starts with /admin, it is the Web interface
-$HTTP["url"] =~ "^/admin/" {
-    # X-Pi-hole is a response header for debugging using curl -I
-    # X-Frame-Options prevents clickjacking attacks and helps ensure your content is not embedded into other sites via < frame >, < iframe > or < object >.
-    # X-XSS-Protection sets the configuration for the cross-site scripting filters built into most browsers. This is important because it tells the browser to block the response if a malicious script has been inserted from a user input.
-    # X-Content-Type-Options stops a browser from trying to MIME-sniff the content type and forces it to stick with the declared content-type. This is important because the browser will only load external resources if their content-type matches what is expected, and not malicious hidden code.
-    # Content-Security-Policy tells the browser where resources are allowed to be loaded and if it’s allowed to parse/run inline styles or Javascript. This is important because it prevents content injection attacks, such as Cross Site Scripting (XSS).
-    # X-Permitted-Cross-Domain-Policies is an XML document that grants a web client, such as Adobe Flash Player or Adobe Acrobat (though not necessarily limited to these), permission to handle data across domains.
-    # Referrer-Policy allows control/restriction of the amount of information present in the referral header for links away from your page—the URL path or even if the header is sent at all.
-    setenv.add-response-header = (
-        "X-Pi-hole" => "The Pi-hole Web interface is working!",
-        "X-Frame-Options" => "DENY",
-        "X-XSS-Protection" => "1; mode=block",
-        "X-Content-Type-Options" => "nosniff",
-        "Content-Security-Policy" => "default-src 'self' 'unsafe-inline';",
-        "X-Permitted-Cross-Domain-Policies" => "none",
-        "Referrer-Policy" => "same-origin"
-    )
-}
-
-# Block . files from being served, such as .git, .github, .gitignore
-$HTTP["url"] =~ "^/admin/\.(.*)" {
-    url.access-deny = ("")
-}
-
-# allow teleporter and API qr code iframe on settings page
-$HTTP["url"] =~ "/(teleporter|api_token)\.php$" {
-    $HTTP["referer"] =~ "/admin/settings\.php" {
-        setenv.add-response-header = ( "X-Frame-Options" => "SAMEORIGIN" )
-    }
-}
-
-# Default expire header
-expire.url = ( "" => "access plus 0 seconds" )
+include "/etc/lighttpd/conf.d/pihole-admin.conf"
diff --git a/advanced/pihole-admin.conf b/advanced/pihole-admin.conf
new file mode 100644
index 00000000..2809d339
--- /dev/null
+++ b/advanced/pihole-admin.conf
@@ -0,0 +1,82 @@
+# Pi-hole: A black hole for Internet advertisements
+# (c) 2017 Pi-hole, LLC (https://pi-hole.net)
+# Network-wide ad blocking via your own hardware.
+#
+# Lighttpd config for Pi-hole
+#
+# This file is copyright under the latest version of the EUPL.
+# Please see LICENSE file for your rights under this license.
+
+###############################################################################
+#     FILE AUTOMATICALLY OVERWRITTEN BY PI-HOLE INSTALL/UPDATE PROCEDURE.     #
+# ANY CHANGES MADE TO THIS FILE AFTER INSTALL WILL BE LOST ON THE NEXT UPDATE #
+###############################################################################
+
+server.errorlog := "/var/log/lighttpd/error-pihole.log"
+
+$HTTP["url"] =~ "^/admin/" {
+    server.document-root = "/var/www/html"
+    server.stream-response-body = 1
+    accesslog.filename = "/var/log/lighttpd/access-pihole.log"
+    accesslog.format = "%{%s}t|%h|%V|%r|%s|%b"
+
+    fastcgi.server = (
+        ".php" => (
+            "localhost" => (
+                "socket" => "/tmp/pihole-php-fastcgi.socket",
+                "bin-path" => "/usr/bin/php-cgi",
+                "min-procs" => 0,
+                "max-procs" => 1,
+                "bin-environment" => (
+                    "PHP_FCGI_CHILDREN" => "4",
+                    "PHP_FCGI_MAX_REQUESTS" => "10000",
+                ),
+                "bin-copy-environment" => (
+                    "PATH", "SHELL", "USER"
+                ),
+                "broken-scriptfilename" => "enable",
+            )
+        )
+    )
+
+    # X-Pi-hole is a response header for debugging using curl -I
+    # X-Frame-Options prevents clickjacking attacks and helps ensure your content is not embedded into other sites via < frame >, < iframe > or < object >.
+    # X-XSS-Protection sets the configuration for the cross-site scripting filters built into most browsers. This is important because it tells the browser to block the response if a malicious script has been inserted from a user input. (deprecated; disabled)
+    # X-Content-Type-Options stops a browser from trying to MIME-sniff the content type and forces it to stick with the declared content-type. This is important because the browser will only load external resources if their content-type matches what is expected, and not malicious hidden code.
+    # Content-Security-Policy tells the browser where resources are allowed to be loaded and if it’s allowed to parse/run inline styles or Javascript. This is important because it prevents content injection attacks, such as Cross Site Scripting (XSS).
+    # X-Permitted-Cross-Domain-Policies is an XML document that grants a web client, such as Adobe Flash Player or Adobe Acrobat (though not necessarily limited to these), permission to handle data across domains.
+    # Referrer-Policy allows control/restriction of the amount of information present in the referral header for links away from your page—the URL path or even if the header is sent at all.
+    setenv.add-response-header = (
+        "X-Pi-hole" => "The Pi-hole Web interface is working!",
+        "X-Frame-Options" => "DENY",
+        "X-XSS-Protection" => "0",
+        "X-Content-Type-Options" => "nosniff",
+        "Content-Security-Policy" => "default-src 'self' 'unsafe-inline';",
+        "X-Permitted-Cross-Domain-Policies" => "none",
+        "Referrer-Policy" => "same-origin"
+    )
+
+    # Block . files from being served, such as .git, .github, .gitignore
+    $HTTP["url"] =~ "^/admin/\." {
+        url.access-deny = ("")
+    }
+
+    # allow teleporter and API qr code iframe on settings page
+    $HTTP["url"] =~ "/(teleporter|api_token)\.php$" {
+        $HTTP["referer"] =~ "/admin/settings\.php" {
+            setenv.set-response-header = ( "X-Frame-Options" => "SAMEORIGIN" )
+        }
+    }
+}
+else $HTTP["url"] == "/admin" {
+    url.redirect = ("" => "/admin/")
+}
+
+$HTTP["host"] == "pi.hole" {
+    $HTTP["url"] == "/" {
+        url.redirect = ("" => "/admin/")
+    }
+}
+
+# (keep this on one line for basic-install.sh filtering during install)
+server.modules += ( "mod_access", "mod_redirect", "mod_fastcgi", "mod_setenv" )
diff --git a/automated install/basic-install.sh b/automated install/basic-install.sh
index 841a04f4..cf27e3ac 100755
--- a/automated install/basic-install.sh	
+++ b/automated install/basic-install.sh	
@@ -82,7 +82,6 @@ PI_HOLE_FILES=(chronometer list piholeDebug piholeLogFlush setupLCD update versi
 PI_HOLE_INSTALL_DIR="/opt/pihole"
 PI_HOLE_CONFIG_DIR="/etc/pihole"
 PI_HOLE_BIN_DIR="/usr/local/bin"
-PI_HOLE_404_DIR="${webroot}/pihole"
 FTL_CONFIG_FILE="${PI_HOLE_CONFIG_DIR}/pihole-FTL.conf"
 if [ -z "$useUpdateVars" ]; then
     useUpdateVars=false
@@ -1380,37 +1379,80 @@ installConfigs() {
         fi
     fi
 
-    # Install pihole-FTL.service
-    install -T -m 0755 "${PI_HOLE_LOCAL_REPO}/advanced/Templates/pihole-FTL.service" "/etc/init.d/pihole-FTL"
+    # Install pihole-FTL systemd or init.d service, based on whether systemd is the init system or not
+    # Follow debhelper logic, which checks for /run/systemd/system to derive whether systemd is the init system
+    if [[ -d '/run/systemd/system' ]]; then
+        install -T -m 0644 "${PI_HOLE_LOCAL_REPO}/advanced/Templates/pihole-FTL.systemd" '/etc/systemd/system/pihole-FTL.service'
+
+        # Remove init.d service if present
+        if [[ -e '/etc/init.d/pihole-FTL' ]]; then
+            rm '/etc/init.d/pihole-FTL'
+            update-rc.d pihole-FTL remove
+        fi
+
+        # Load final service
+        systemctl daemon-reload
+    else
+        install -T -m 0755 "${PI_HOLE_LOCAL_REPO}/advanced/Templates/pihole-FTL.service" '/etc/init.d/pihole-FTL'
+    fi
+    install -T -m 0755 "${PI_HOLE_LOCAL_REPO}/advanced/Templates/pihole-FTL-prestart.sh" "${PI_HOLE_INSTALL_DIR}/pihole-FTL-prestart.sh"
+    install -T -m 0755 "${PI_HOLE_LOCAL_REPO}/advanced/Templates/pihole-FTL-poststop.sh" "${PI_HOLE_INSTALL_DIR}/pihole-FTL-poststop.sh"
 
     # If the user chose to install the dashboard,
     if [[ "${INSTALL_WEB_SERVER}" == true ]]; then
-        # and if the Web server conf directory does not exist,
-        if [[ ! -d "/etc/lighttpd" ]]; then
-            # make it and set the owners
-            install -d -m 755 -o "${USER}" -g root /etc/lighttpd
-        # Otherwise, if the config file already exists
-        elif [[ -f "${lighttpdConfig}" ]]; then
-            # back up the original
-            mv "${lighttpdConfig}"{,.orig}
+        if grep -q -F "FILE AUTOMATICALLY OVERWRITTEN BY PI-HOLE" "${lighttpdConfig}"; then
+            # Attempt to preserve backwards compatibility with older versions
+            install -D -m 644 -T ${PI_HOLE_LOCAL_REPO}/advanced/${LIGHTTPD_CFG} "${lighttpdConfig}"
+            # Make the directories if they do not exist and set the owners
+            mkdir -p /run/lighttpd
+            chown ${LIGHTTPD_USER}:${LIGHTTPD_GROUP} /run/lighttpd
+            mkdir -p /var/cache/lighttpd/compress
+            chown ${LIGHTTPD_USER}:${LIGHTTPD_GROUP} /var/cache/lighttpd/compress
+            mkdir -p /var/cache/lighttpd/uploads
+            chown ${LIGHTTPD_USER}:${LIGHTTPD_GROUP} /var/cache/lighttpd/uploads
         fi
-        # and copy in the config file Pi-hole needs
-        install -D -m 644 -T ${PI_HOLE_LOCAL_REPO}/advanced/${LIGHTTPD_CFG} "${lighttpdConfig}"
-        # Make sure the external.conf file exists, as lighttpd v1.4.50 crashes without it
-        if [ ! -f /etc/lighttpd/external.conf ]; then
-            install -m 644 /dev/null /etc/lighttpd/external.conf
+        # Copy the config file to include for pihole admin interface
+        if [[ -d "/etc/lighttpd/conf.d" ]]; then
+            install -D -m 644 -T ${PI_HOLE_LOCAL_REPO}/advanced/pihole-admin.conf /etc/lighttpd/conf.d/pihole-admin.conf
+            if grep -q -F 'include "/etc/lighttpd/conf.d/pihole-admin.conf"' "${lighttpdConfig}"; then
+                :
+            else
+                echo 'include "/etc/lighttpd/conf.d/pihole-admin.conf"' >> "${lighttpdConfig}"
+            fi
+            # Avoid some warnings trace from lighttpd, which might break tests
+            conf=/etc/lighttpd/conf.d/pihole-admin.conf
+            if lighttpd -f "${lighttpdConfig}" -tt 2>&1 | grep -q -F "WARNING: unknown config-key: dir-listing\."; then
+                echo '# Avoid some warnings trace from lighttpd, which might break tests' >> $conf
+                echo 'server.modules += ( "mod_dirlisting" )' >> $conf
+            fi
+            if lighttpd -f "${lighttpdConfig}" -tt 2>&1 | grep -q -F "warning: please use server.use-ipv6"; then
+                echo '# Avoid some warnings trace from lighttpd, which might break tests' >> $conf
+                echo 'server.use-ipv6 := "disable"' >> $conf
+            fi
+        elif [[ -d "/etc/lighttpd/conf-available" ]]; then
+            conf=/etc/lighttpd/conf-available/15-pihole-admin.conf
+            install -D -m 644 -T ${PI_HOLE_LOCAL_REPO}/advanced/pihole-admin.conf $conf
+            # disable server.modules += ( ... ) in $conf to avoid module dups
+            # (needed until Debian 10 no longer supported by pi-hole)
+            # (server.modules duplication is ignored in lighttpd 1.4.56+)
+            if awk '!/^server\.modules/{print}' $conf > $conf.$$ && mv $conf.$$ $conf; then
+                :
+            else
+                rm $conf.$$
+            fi
+            chmod 644 $conf
+            if is_command lighty-enable-mod ; then
+                lighty-enable-mod pihole-admin access redirect fastcgi setenv > /dev/null || true
+            else
+                # Otherwise, show info about installing them
+                printf "  %b Warning: 'lighty-enable-mod' utility not found\\n" "${INFO}"
+                printf "      Please ensure fastcgi is enabled if you experience issues\\n"
+            fi
+        else
+            # lighttpd config include dir not found
+            printf "  %b Warning: lighttpd config include dir not found\\n" "${INFO}"
+            printf "      Please manually install pihole-admin.conf\\n"
         fi
-        # If there is a custom block page in the html/pihole directory, replace 404 handler in lighttpd config
-        if [[ -f "${PI_HOLE_404_DIR}/custom.php" ]]; then
-            sed -i 's/^\(server\.error-handler-404\s*=\s*\).*$/\1"\/pihole\/custom\.php"/' "${lighttpdConfig}"
-        fi
-        # Make the directories if they do not exist and set the owners
-        mkdir -p /run/lighttpd
-        chown ${LIGHTTPD_USER}:${LIGHTTPD_GROUP} /run/lighttpd
-        mkdir -p /var/cache/lighttpd/compress
-        chown ${LIGHTTPD_USER}:${LIGHTTPD_GROUP} /var/cache/lighttpd/compress
-        mkdir -p /var/cache/lighttpd/uploads
-        chown ${LIGHTTPD_USER}:${LIGHTTPD_GROUP} /var/cache/lighttpd/uploads
     fi
 }
 
@@ -1661,30 +1703,6 @@ install_dependent_packages() {
 
 # Install the Web interface dashboard
 installPiholeWeb() {
-    printf "\\n  %b Installing 404 page...\\n" "${INFO}"
-
-    local str="Creating directory for 404 page, and copying files"
-    printf "  %b %s..." "${INFO}" "${str}"
-    # Install the directory
-    install -d -m 0755 ${PI_HOLE_404_DIR}
-    # and the 404 handler
-    install -D -m 644 ${PI_HOLE_LOCAL_REPO}/advanced/index.php ${PI_HOLE_404_DIR}/
-
-    printf "%b  %b %s\\n" "${OVER}" "${TICK}" "${str}"
-
-    local str="Backing up index.lighttpd.html"
-    printf "  %b %s..." "${INFO}" "${str}"
-    # If the default index file exists,
-    if [[ -f "${webroot}/index.lighttpd.html" ]]; then
-        # back it up
-        mv ${webroot}/index.lighttpd.html ${webroot}/index.lighttpd.orig
-        printf "%b  %b %s\\n" "${OVER}" "${TICK}" "${str}"
-    else
-        # Otherwise, don't do anything
-        printf "%b  %b %s\\n" "${OVER}" "${INFO}" "${str}"
-        printf "      No default index.lighttpd.html file found... not backing up\\n"
-    fi
-
     # Install Sudoers file
     local str="Installing sudoer file"
     printf "\\n  %b %s..." "${INFO}" "${str}"
@@ -1760,20 +1778,35 @@ create_pihole_user() {
     else
         # If the pihole user doesn't exist,
         printf "%b  %b %s" "${OVER}" "${CROSS}" "${str}"
-        local str="Creating user 'pihole'"
-        printf "%b  %b %s..." "${OVER}" "${INFO}" "${str}"
-        # create her with the useradd command,
+        local str="Checking for group 'pihole'"
+        printf "  %b %s..." "${INFO}" "${str}"
         if getent group pihole > /dev/null 2>&1; then
-            # then add her to the pihole group (as it already exists)
+            # group pihole exists
+            printf "%b  %b %s\\n" "${OVER}" "${TICK}" "${str}"
+            # then create and add her to the pihole group
+            local str="Creating user 'pihole'"
+            printf "%b  %b %s..." "${OVER}" "${INFO}" "${str}"
             if useradd -r --no-user-group -g pihole -s /usr/sbin/nologin pihole; then
                 printf "%b  %b %s\\n" "${OVER}" "${TICK}" "${str}"
             else
                 printf "%b  %b %s\\n" "${OVER}" "${CROSS}" "${str}"
             fi
         else
-            # add user pihole with default group settings
-            if useradd -r -s /usr/sbin/nologin pihole; then
+            # group pihole does not exist
+            printf "%b  %b %s\\n" "${OVER}" "${CROSS}" "${str}"
+            local str="Creating group 'pihole'"
+            # if group can be created
+            if groupadd pihole; then
                 printf "%b  %b %s\\n" "${OVER}" "${TICK}" "${str}"
+                # create and add pihole user to the pihole group
+                local str="Creating user 'pihole'"
+                printf "%b  %b %s..." "${OVER}" "${INFO}" "${str}"
+                if useradd -r --no-user-group -g pihole -s /usr/sbin/nologin pihole; then
+                    printf "%b  %b %s\\n" "${OVER}" "${TICK}" "${str}"
+                else
+                    printf "%b  %b %s\\n" "${OVER}" "${CROSS}" "${str}"
+                fi
+
             else
                 printf "%b  %b %s\\n" "${OVER}" "${CROSS}" "${str}"
             fi
@@ -1872,15 +1905,6 @@ installPihole() {
             # Give lighttpd access to the pihole group so the web interface can
             # manage the gravity.db database
             usermod -a -G pihole ${LIGHTTPD_USER}
-            # If the lighttpd command is executable,
-            if is_command lighty-enable-mod ; then
-                # enable fastcgi and fastcgi-php
-                lighty-enable-mod fastcgi fastcgi-php > /dev/null || true
-            else
-                # Otherwise, show info about installing them
-                printf "  %b Warning: 'lighty-enable-mod' utility not found\\n" "${INFO}"
-                printf "      Please ensure fastcgi is enabled if you experience issues\\n"
-            fi
         fi
     fi
     # Install base files and web interface
@@ -2693,12 +2717,12 @@ main() {
 
     restart_service pihole-FTL
 
-    # Download and compile the aggregated block list
-    runGravity
-
     # Update local and remote versions via updatechecker
     /opt/pihole/updatecheck.sh
 
+    # Download and compile the aggregated block list
+    runGravity
+
     if [[ "${useUpdateVars}" == false ]]; then
         displayFinalMessage "${pw}"
     fi
diff --git a/automated install/uninstall.sh b/automated install/uninstall.sh
index 0b516d0f..c36027fc 100755
--- a/automated install/uninstall.sh	
+++ b/automated install/uninstall.sh	
@@ -131,6 +131,7 @@ removeNoPurge() {
     fi
 
     if package_check lighttpd > /dev/null; then
+        # Attempt to preserve backwards compatibility with older versions
         if [[ -f /etc/lighttpd/lighttpd.conf.orig ]]; then
             ${SUDO} mv /etc/lighttpd/lighttpd.conf.orig /etc/lighttpd/lighttpd.conf
         fi
@@ -139,6 +140,29 @@ removeNoPurge() {
             ${SUDO} rm /etc/lighttpd/external.conf
         fi
 
+        # Fedora-based
+        if [[ -f /etc/lighttpd/conf.d/pihole-admin.conf ]]; then
+            ${SUDO} rm /etc/lighttpd/conf.d/pihole-admin.conf
+            conf=/etc/lighttpd/lighttpd.conf
+            tconf=/tmp/lighttpd.conf.$$
+            if awk '!/^include "\/etc\/lighttpd\/conf\.d\/pihole-admin\.conf"$/{print}' \
+              $conf > $tconf && mv $tconf $conf; then
+                :
+            else
+                rm $tconf
+            fi
+            ${SUDO} chown root:root $conf
+            ${SUDO} chmod 644 $conf
+        fi
+
+        # Debian-based
+        if [[ -f /etc/lighttpd/conf-available/pihole-admin.conf ]]; then
+            if is_command lighty-disable-mod ; then
+                ${SUDO} lighty-disable-mod pihole-admin > /dev/null || true
+            fi
+            ${SUDO} rm /etc/lighttpd/conf-available/15-pihole-admin.conf
+        fi
+
         echo -e "  ${TICK} Removed lighttpd configs"
     fi
 
diff --git a/gravity.sh b/gravity.sh
index 14732f31..a5c944ce 100755
--- a/gravity.sh
+++ b/gravity.sh
@@ -524,15 +524,20 @@ num_target_lines=0
 num_source_lines=0
 num_invalid=0
 parseList() {
-  local adlistID="${1}" src="${2}" target="${3}" incorrect_lines
+  local adlistID="${1}" src="${2}" target="${3}" incorrect_lines sample_incorrect_lines
   # This sed does the following things:
-  # 1. Remove all domains containing invalid characters. Valid are: a-z, A-Z, 0-9, dot (.), minus (-), underscore (_)
-  # 2. Append ,adlistID to every line
-  # 3. Remove trailing period (see https://github.com/pi-hole/pi-hole/issues/4701)
-  # 4. Ensures there is a newline on the last line
-  sed -e "/[^a-zA-Z0-9.\_-]/d;s/\.$//;s/$/,${adlistID}/;/.$/a\\" "${src}" >> "${target}"
-  # Find (up to) five domains containing invalid characters (see above)
-  incorrect_lines="$(sed -e "/[^a-zA-Z0-9.\_-]/!d" "${src}" | head -n 5)"
+  # 1. Remove all lines containing no domains
+  # 2. Remove all domains containing invalid characters. Valid are: a-z, A-Z, 0-9, dot (.), minus (-), underscore (_)
+  # 3. Append ,adlistID to every line
+  # 4. Remove trailing period (see https://github.com/pi-hole/pi-hole/issues/4701)
+  # 5. Ensures there is a newline on the last line
+  sed -r  "/([^\.]+\.)+[^\.]{2,}/!d;/[^a-zA-Z0-9.\_-]/d;s/\.$//;s/$/,${adlistID}/;/.$/a\\" "${src}" >> "${target}"
+
+  # Find lines containing no domains or with invalid characters (see above)
+  # Remove duplicates and limit to 5 domains
+  mapfile -t incorrect_lines <<< "$(sed -r "/([^\.]+\.)+[^\.]{2,}/d" < "${src}")"
+  mapfile -t -O "${#incorrect_lines[@]}" incorrect_lines <<< "$(sed -r "/[^a-zA-Z0-9.\_-]/!d" < "${src}")"
+  IFS=" " read -r -a sample_incorrect_lines <<< "$(tr ' ' '\n' <<< "${incorrect_lines[@]}" | sort -u | head -n 5| tr '\n' ' ')"
 
   local num_target_lines_new num_correct_lines
   # Get number of lines in source file
@@ -551,11 +556,12 @@ parseList() {
   fi
 
   # Display sample of invalid lines if we found some
-  if [[ -n "${incorrect_lines}" ]]; then
+  if [ ${#sample_incorrect_lines[@]} -ne 0 ]; then
     echo "      Sample of invalid domains:"
-    while IFS= read -r line; do
-      echo "      - ${line}"
-    done <<< "${incorrect_lines}"
+    for each in "${sample_incorrect_lines[@]}"
+    do
+        echo "      - ${each}"
+    done
   fi
 }
 compareLists() {
@@ -731,13 +737,13 @@ gravity_ParseFileIntoDomains() {
   # 3) Remove comments (text starting with "#", include possible spaces before the hash sign)
   # 4) Remove lines containing "/"
   # 5) Remove leading tabs, spaces, etc.
-  # 6) Delete lines not matching domain names
+  # 6) Remove empty lines
   < "${src}" tr -d '\r' | \
   tr '[:upper:]' '[:lower:]' | \
   sed 's/\s*#.*//g' | \
   sed -r '/(\/).*$/d' | \
   sed -r 's/^.*\s+//g' | \
-  sed -r '/([^\.]+\.)+[^\.]{2,}/!d' >  "${destination}"
+  sed '/^$/d'>  "${destination}"
   chmod 644 "${destination}"
 }
 
diff --git a/manpages/pihole.8 b/manpages/pihole.8
index 11c21b28..1cf8ab35 100644
--- a/manpages/pihole.8
+++ b/manpages/pihole.8
@@ -23,7 +23,7 @@ Pi-hole : A black-hole for internet advertisements
 .br
 pihole -r
 .br
-pihole -t
+\fBpihole\fR \fB-t\fR [arg]
 .br
 pihole -g\fR
 .br
@@ -113,11 +113,15 @@ Available commands and options:
     Reconfigure or Repair Pi-hole subsystems
 .br
 
-\fB-t, tail\fR
+\fB-t, tail\fR [arg]
 .br
     View the live output of the Pi-hole log
 .br
 
+      [arg]             Optional argument to filter the log for
+                        (regular expressions are supported)
+.br
+
 \fB-a, admin\fR [options]
 .br
 
diff --git a/pihole b/pihole
index ca80bff8..a99a37e7 100755
--- a/pihole
+++ b/pihole
@@ -23,6 +23,9 @@ source "${colfile}"
 utilsfile="${PI_HOLE_SCRIPT_DIR}/utils.sh"
 source "${utilsfile}"
 
+versionsfile="/etc/pihole/versions"
+source "${versionsfile}"
+
 webpageFunc() {
   source "${PI_HOLE_SCRIPT_DIR}/webpage.sh"
   main "$@"
@@ -63,14 +66,22 @@ arpFunc() {
 }
 
 updatePiholeFunc() {
-  shift
-  "${PI_HOLE_SCRIPT_DIR}"/update.sh "$@"
-  exit 0
+  if [ -n "${DOCKER_VERSION}" ]; then
+    unsupportedFunc
+  else
+    shift
+    "${PI_HOLE_SCRIPT_DIR}"/update.sh "$@"
+    exit 0
+  fi
 }
 
 reconfigurePiholeFunc() {
-  /etc/.pihole/automated\ install/basic-install.sh --reconfigure
-  exit 0;
+  if [ -n "${DOCKER_VERSION}" ]; then
+    unsupportedFunc
+  else
+    /etc/.pihole/automated\ install/basic-install.sh --reconfigure
+    exit 0;
+  fi
 }
 
 updateGravityFunc() {
@@ -91,8 +102,12 @@ chronometerFunc() {
 
 
 uninstallFunc() {
-  "${PI_HOLE_SCRIPT_DIR}"/uninstall.sh
-  exit 0
+  if [ -n "${DOCKER_VERSION}" ]; then
+    unsupportedFunc
+  else
+    "${PI_HOLE_SCRIPT_DIR}"/uninstall.sh
+    exit 0
+  fi
 }
 
 versionFunc() {
@@ -429,6 +444,11 @@ updateCheckFunc() {
   exit 0
 }
 
+unsupportedFunc(){
+  echo "Function not supported in Docker images"
+  exit 0
+}
+
 helpFunc() {
   echo "Usage: pihole [options]
 Example: 'pihole -w -h'
diff --git a/test/_fedora_37.Dockerfile b/test/_fedora_37.Dockerfile
new file mode 100644
index 00000000..b4f939ba
--- /dev/null
+++ b/test/_fedora_37.Dockerfile
@@ -0,0 +1,18 @@
+FROM fedora:37
+RUN dnf install -y git initscripts
+
+ENV GITDIR /etc/.pihole
+ENV SCRIPTDIR /opt/pihole
+
+RUN mkdir -p $GITDIR $SCRIPTDIR /etc/pihole
+ADD . $GITDIR
+RUN cp $GITDIR/advanced/Scripts/*.sh $GITDIR/gravity.sh $GITDIR/pihole $GITDIR/automated\ install/*.sh $SCRIPTDIR/
+ENV PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$SCRIPTDIR
+
+RUN true && \
+    chmod +x $SCRIPTDIR/*
+
+ENV SKIP_INSTALL true
+ENV OS_CHECK_DOMAIN_NAME dev-supportedos.pi-hole.net
+
+#sed '/# Start the installer/Q' /opt/pihole/basic-install.sh > /opt/pihole/stub_basic-install.sh && \
diff --git a/test/requirements.txt b/test/requirements.txt
index 0eb22a1b..e891242c 100644
--- a/test/requirements.txt
+++ b/test/requirements.txt
@@ -1,5 +1,6 @@
-docker-compose
-pytest
-pytest-xdist
-pytest-testinfra
-tox
+docker-compose == 1.29.2
+pytest == 7.2.1
+pytest-xdist == 3.1.0
+pytest-testinfra == 7.0.0
+tox == 4.2.8
+
diff --git a/test/test_any_automated_install.py b/test/test_any_automated_install.py
index e6673bb5..c1288287 100644
--- a/test/test_any_automated_install.py
+++ b/test/test_any_automated_install.py
@@ -129,34 +129,16 @@ def test_installPiholeWeb_fresh_install_no_errors(host):
     installPiholeWeb
     """
     )
-    expected_stdout = info_box + " Installing 404 page..."
-    assert expected_stdout in installWeb.stdout
-    expected_stdout = tick_box + (
-        " Creating directory for 404 page, " "and copying files"
-    )
-    assert expected_stdout in installWeb.stdout
-    expected_stdout = info_box + " Backing up index.lighttpd.html"
-    assert expected_stdout in installWeb.stdout
-    expected_stdout = "No default index.lighttpd.html file found... " "not backing up"
-    assert expected_stdout in installWeb.stdout
     expected_stdout = tick_box + " Installing sudoer file"
     assert expected_stdout in installWeb.stdout
-    web_directory = host.run("ls -r /var/www/html/pihole").stdout
-    assert "index.php" in web_directory
 
 
 def get_directories_recursive(host, directory):
     if directory is None:
         return directory
-    ls = host.run("ls -d {}".format(directory + "/*/"))
-    directories = list(filter(bool, ls.stdout.splitlines()))
-    dirs = directories
-    for dirval in directories:
-        dir_rec = get_directories_recursive(host, dirval)
-        if isinstance(dir_rec, str):
-            dirs.extend([dir_rec])
-        else:
-            dirs.extend(dir_rec)
+    # returns all non-hidden subdirs of 'directory'
+    dirs_raw = host.run("find {} -type d -not -path '*/.*'".format(directory))
+    dirs = list(filter(bool, dirs_raw.stdout.splitlines()))
     return dirs
 
 
@@ -211,6 +193,8 @@ def test_installPihole_fresh_install_readableFiles(host):
     maninstalled = True
     if (info_box + " man not installed") in install.stdout:
         maninstalled = False
+    if (info_box + " man pages not installed") in install.stdout:
+        maninstalled = False
     piholeuser = "pihole"
     exit_status_success = 0
     test_cmd = 'su --shell /bin/bash --command "test -{0} {1}" -p {2}'
@@ -287,6 +271,24 @@ def test_installPihole_fresh_install_readableFiles(host):
     check_lighttpd = test_cmd.format("r", "/etc/lighttpd/lighttpd.conf", piholeuser)
     actual_rc = host.run(check_lighttpd).rc
     assert exit_status_success == actual_rc
+    # check readable /etc/lighttpd/conf*/pihole-admin.conf
+    check_lighttpd = test_cmd.format("r", "/etc/lighttpd/conf.d", piholeuser)
+    if host.run(check_lighttpd).rc == exit_status_success:
+        check_lighttpd = test_cmd.format(
+            "r", "/etc/lighttpd/conf.d/pihole-admin.conf", piholeuser
+        )
+        actual_rc = host.run(check_lighttpd).rc
+        assert exit_status_success == actual_rc
+    else:
+        check_lighttpd = test_cmd.format(
+            "r", "/etc/lighttpd/conf-available", piholeuser
+        )
+        if host.run(check_lighttpd).rc == exit_status_success:
+            check_lighttpd = test_cmd.format(
+                "r", "/etc/lighttpd/conf-available/15-pihole-admin.conf", piholeuser
+            )
+            actual_rc = host.run(check_lighttpd).rc
+            assert exit_status_success == actual_rc
     # check readable and executable manpages
     if maninstalled is True:
         check_man = test_cmd.format("x", "/usr/local/share/man", piholeuser)
@@ -396,7 +398,7 @@ def test_installPihole_fresh_install_readableBlockpage(host, test_webpage):
             usergroup="${{LIGHTTPD_USER}}:${{LIGHTTPD_GROUP}}",
             chmodarg="{{}}",
             config="/etc/lighttpd/lighttpd.conf",
-            run="/var/run/lighttpd",
+            run="/run/lighttpd",
             cache="/var/cache/lighttpd",
             uploads="/var/cache/lighttpd/uploads",
             compress="/var/cache/lighttpd/compress",
@@ -512,7 +514,7 @@ def test_installPihole_fresh_install_readableBlockpage(host, test_webpage):
     check_admin = test_cmd.format("x", webroot + "/admin", webuser)
     actual_rc = host.run(check_admin).rc
     assert exit_status_success == actual_rc
-    directories = get_directories_recursive(host, webroot + "/admin/*/")
+    directories = get_directories_recursive(host, webroot + "/admin/")
     for directory in directories:
         check_pihole = test_cmd.format("r", directory, webuser)
         actual_rc = host.run(check_pihole).rc
@@ -536,16 +538,6 @@ def test_installPihole_fresh_install_readableBlockpage(host, test_webpage):
         return bool(m)
 
     if installWebInterface is True:
-        check_pihole = test_cmd.format("r", webroot + "/pihole", webuser)
-        actual_rc = host.run(check_pihole).rc
-        assert exit_status_success == actual_rc
-        check_pihole = test_cmd.format("x", webroot + "/pihole", webuser)
-        actual_rc = host.run(check_pihole).rc
-        assert exit_status_success == actual_rc
-        # check most important files in $webroot for read permission
-        check_index = test_cmd.format("r", webroot + "/pihole/index.php", webuser)
-        actual_rc = host.run(check_index).rc
-        assert exit_status_success == actual_rc
         if test_webpage is True:
             # check webpage for unreadable files
             noPHPfopen = re.compile(
diff --git a/test/tox.centos_8.ini b/test/tox.centos_8.ini
index dc160d2a..dac10e97 100644
--- a/test/tox.centos_8.ini
+++ b/test/tox.centos_8.ini
@@ -1,8 +1,8 @@
 [tox]
 envlist = py3
 
-[testenv]
+[testenv:py3]
 allowlist_externals = docker
 deps = -rrequirements.txt
-commands = docker build -f _centos_8.Dockerfile -t pytest_pihole:test_container ../
-           pytest {posargs:-vv -n auto} ./test_any_automated_install.py ./test_any_utils.py ./test_centos_fedora_common_support.py ./test_centos_common_support.py
+commands =  docker build -f _centos_8.Dockerfile -t pytest_pihole:test_container ../
+            pytest {posargs:-vv -n auto} ./test_any_automated_install.py ./test_any_utils.py ./test_centos_fedora_common_support.py ./test_centos_common_support.py
diff --git a/test/tox.centos_9.ini b/test/tox.centos_9.ini
index 633fc5c4..aa7009e1 100644
--- a/test/tox.centos_9.ini
+++ b/test/tox.centos_9.ini
@@ -1,7 +1,7 @@
 [tox]
 envlist = py3
 
-[testenv]
+[testenv:py3]
 allowlist_externals = docker
 deps = -rrequirements.txt
 commands = docker build -f _centos_9.Dockerfile -t pytest_pihole:test_container ../
diff --git a/test/tox.debian_10.ini b/test/tox.debian_10.ini
index ef9fa7a0..a012bda4 100644
--- a/test/tox.debian_10.ini
+++ b/test/tox.debian_10.ini
@@ -1,7 +1,7 @@
 [tox]
 envlist = py3
 
-[testenv]
+[testenv:py3]
 allowlist_externals = docker
 deps = -rrequirements.txt
 commands = docker build -f _debian_10.Dockerfile -t pytest_pihole:test_container ../
diff --git a/test/tox.debian_11.ini b/test/tox.debian_11.ini
index 6d25a0c8..48dc9df1 100644
--- a/test/tox.debian_11.ini
+++ b/test/tox.debian_11.ini
@@ -1,7 +1,7 @@
 [tox]
 envlist = py3
 
-[testenv]
+[testenv:py3]
 allowlist_externals = docker
 deps = -rrequirements.txt
 commands = docker build -f _debian_11.Dockerfile -t pytest_pihole:test_container ../
diff --git a/test/tox.fedora_35.ini b/test/tox.fedora_35.ini
index 5e90426d..c571a564 100644
--- a/test/tox.fedora_35.ini
+++ b/test/tox.fedora_35.ini
@@ -1,7 +1,7 @@
 [tox]
 envlist = py3
 
-[testenv]
+[testenv:py3]
 allowlist_externals = docker
 deps = -rrequirements.txt
 commands = docker build -f _fedora_35.Dockerfile -t pytest_pihole:test_container ../
diff --git a/test/tox.fedora_36.ini b/test/tox.fedora_36.ini
index 1d250f82..0cc6f29c 100644
--- a/test/tox.fedora_36.ini
+++ b/test/tox.fedora_36.ini
@@ -1,7 +1,7 @@
 [tox]
 envlist = py3
 
-[testenv]
+[testenv:py3]
 allowlist_externals = docker
 deps = -rrequirements.txt
 commands = docker build -f _fedora_36.Dockerfile -t pytest_pihole:test_container ../
diff --git a/test/tox.fedora_37.ini b/test/tox.fedora_37.ini
new file mode 100644
index 00000000..d6f44533
--- /dev/null
+++ b/test/tox.fedora_37.ini
@@ -0,0 +1,8 @@
+[tox]
+envlist = py3
+
+[testenv]
+allowlist_externals = docker
+deps = -rrequirements.txt
+commands = docker build -f _fedora_37.Dockerfile -t pytest_pihole:test_container ../
+           pytest {posargs:-vv -n auto} ./test_any_automated_install.py ./test_any_utils.py ./test_centos_fedora_common_support.py ./test_fedora_support.py
diff --git a/test/tox.ubuntu_20.ini b/test/tox.ubuntu_20.ini
index 4ae79a0c..88ee0b54 100644
--- a/test/tox.ubuntu_20.ini
+++ b/test/tox.ubuntu_20.ini
@@ -1,7 +1,7 @@
 [tox]
 envlist = py3
 
-[testenv]
+[testenv:py3]
 allowlist_externals = docker
 deps = -rrequirements.txt
 commands = docker build -f _ubuntu_20.Dockerfile -t pytest_pihole:test_container ../
diff --git a/test/tox.ubuntu_22.ini b/test/tox.ubuntu_22.ini
index 3ddf7eca..cb5527ab 100644
--- a/test/tox.ubuntu_22.ini
+++ b/test/tox.ubuntu_22.ini
@@ -1,7 +1,7 @@
 [tox]
 envlist = py3
 
-[testenv]
+[testenv:py3]
 allowlist_externals = docker
 deps = -rrequirements.txt
 commands = docker build -f _ubuntu_22.Dockerfile -t pytest_pihole:test_container ../