Since Pi-hole redirects ad domains to itself, accessing the script via de.ign.com is the same as pi.hole in this case. The fix should be as simple as adding a / before admin on this line.
* An "About Pi-hole" link on the block page provides an ELI5 explanation to those not familiar with Pi-hole
* An email contact link on the block page provides users of your Pi-hole with a means to easily get in touch with you
* Browsing to your Pi-hole's address will show a simple "landing page", which can be replaced by adding "landing.php" within "/var/www/html"
* Users manually browsing to file/image based content (i.e: non HTML based content) on blocked sites will be greeted with a small "Blocked by Pi-hole" image
* Sites that are manually blacklisted will display a notice of this on the block page
* Sites that aren't directly blocked, but have a CNAME record, will show a notification on the block page (e.g: If raw.githubusercontent.com is not blocked, but github.map.fastly.net is)
* On the block page, "Back to Safety" now directs the user to "about:home" if Javascript is disabled
* Whitelisting is disabled for installs without a password, or if a client does not have Javascript
* Known issues:
* Admin Console needs a text field under "Web User Interface" where the admin can enter a preferred contact email when a site needs to be whitelisted, to be saved to setupVars.conf with the key "ADMIN_EMAIL"
* Admin Console needs a text field under "Networking" where the admin can enter their Pi-hole's externally contactable FQDN, allowing access to their landing page when browsing to mypi.duckdns.org, to be saved to setupVars.conf with the key "FQDN"
* I am not aware of expected output of `$_SERVER["VIRTUAL_HOST"]`, so I have assumed it should be filtered as if it's a domain
If someone tries to access 'http://pi.hole/', it will take them to the "Website blocked" page. Very confusing if you don't know to go to 'http://pi.hole/admin/'. This just redirects them to the admin panel.