The Pi-hole blocks ads via a [DNS sinkhole](https://en.wikipedia.org/wiki/DNS_Sinkhole), so all your devices are protected without the need to install client-side software.
- **Easy-to-install**: our versatile installer walks you through the process, and [takes less than ten minutes](https://www.youtube.com/watch?v=vKWjx1AQYgs)
- **Resolute**: ads are blocked in _non-browser locations_ such as ad-laden mobile apps and smart TVs
- **Fast**: speeds up the feel of everyday browsing by caching DNS queries, saving bandwidth
- **Lightweight**: runs smoothly and requires [minimal resources](https://discourse.pi-hole.net/t/hardware-software-requirements/273)
- **Robust**: a command line interface for those preferring CLI, and/or wanting to automate tasks
- **Scalable**: [capable of handling hundreds of millions of queries](https://pi-hole.net/2017/05/24/how-much-traffic-can-pi-hole-handle/) when installed on powerful hardware
- **Modern**: blocks ads over both IPv4 and IPv6
- **Free**: open source software which helps ensure _you_ are the sole person in control of your privacy
[Piping to `bash` can be dangerous](https://pi-hole.net/2016/07/25/curling-and-piping-to-bash/), so we understand the importance of giving people the option to review our code! Our installer is [found here](https://github.com/pi-hole/pi-hole/blob/master/automated%20install/basic-install.sh), if you wish to read it before running.
Once the installer has been run, you will need to [configure your router to have **DHCP clients use the Pi-hole as their DNS server**](https://discourse.pi-hole.net/t/how-do-i-configure-my-devices-to-use-pi-hole-as-their-dns-server/245) so that any device that connects to your network will have ads blocked without any further intervention.
If your router does not support setting the DNS server, you can [use Pi-hole's built in DHCP server](https://discourse.pi-hole.net/t/how-do-i-use-pi-holes-built-in-dhcp-server-and-why-would-i-want-to/3026); just be sure to disable DHCP on your router first (if it has that feature available).
As a last resort, you can always manually set each device to use Pi-hole as their DNS server.
-----
## Pi-hole is free, but powered by your support
There are many reoccuring costs involved with maintaining free, open source and privacy respecting software; expenses which [our volunteers](https://github.com/orgs/pi-hole/people) pitch in to cover out-of-pocket. This is just one example of how strongly we feel about our software, as well as the importance of keeping it maintained.
-  [Donate via PayPal](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=3J2L3Z4DHW9UY)
If you have something to add - anything from a typo through to a whole new feature, we're happy to check it out! Just make sure to fill out our template when submitting your request; the questions that it asks will help the volunteers quickly understand what you're aiming to achieve.
You'll find that the [install script](https://github.com/pi-hole/pi-hole/blob/master/automated%20install/basic-install.sh) and the [debug script](https://github.com/pi-hole/pi-hole/blob/master/advanced/Scripts/piholeDebug.sh) have an abundance of comments, which will help you better understand how Pi-hole works. They're also a valuable resource to those who want to learn how to write scripts or code a program! We encourage anyone who likes to tinker to read through it, and submit a pull request for us to review.
Word-of-mouth continues to help our project grow immensely, and we'd like to help those who are going to be presenting Pi-hole at a conference, meetup or even a school project. If you'd like some free swag to hand out to your audience, [get in touch with us](https://pi-hole.net/2017/05/17/giving-a-presentation-on-pi-hole-contact-us-first-for-some-goodies-and-support/).
This optional [open source](https://github.com/almasaeed2010/AdminLTE) dashboard allows you to view stats, change settings, and configure your Pi-hole.
The [FTL API](https://github.com/pi-hole/FTL) can be accessed via the Web, Command Line and `telnet`.
The Web (`admin/api.php`) and Command Line (`pihole -c -j`) will return `json` formatted output:
```
{
"domains_being_blocked":111175,
"dns_queries_today":15669,
"ads_blocked_today":1752,
"ads_percentage_today":11.181314,
"unique_domains":1178,
"queries_forwarded":9177,
"queries_cached":4740,
"unique_clients":18
}
```
More details on the API can be found [here](https://discourse.pi-hole.net/t/pi-hole-api/1863) and `telnet` on [the repo itself](https://github.com/pi-hole/FTL).
If enabled, the query log will show all of the DNS queries requested by clients using Pi-hole as their DNS server. Standard domains will show in green, and blocked (_Pi-holed_) domains will show in red. You can also whitelist or blacklist domains from within this section.
The query log and graphs are what have helped people [discover all sorts of unexpected traffic traversing their networks](https://pi-hole.net/2017/07/06/round-3-what-really-happens-on-your-network/).
Using our FTL API, Pi-hole will store all the DNS queries in a database for later retrieval and analysis. You can view this data as a graph, individual queries, top clients/advertisers, or even query the database yourself for your own applications.
Domains can be [whitelisted](https://discourse.pi-hole.net/t/commonly-whitelisted-domains/212) or [blacklisted](https://discourse.pi-hole.net/t/commonly-blacklisted-domains/305) using either the dashboard, or via [the `pihole` command](https://discourse.pi-hole.net/t/the-pihole-command-with-examples/738).
Pi-hole's stock block lists cover over 100,000 known ad-serving domains, which helps ensure you encounter minimal false positives. You can expand the blocking power of your Pi-hole by [adding additional lists](https://discourse.pi-hole.net/t/how-do-i-add-additional-block-lists-to-pi-hole/259) such as the ones found at [The Big Blocklist Collection](https://wally3k.github.io/).
There are times where you may want to disable the blocking functionality, and turn it back on again. You can toggle this via the dashboard or command line.
This runs [`gravity`](https://github.com/pi-hole/pi-hole/blob/master/gravity.sh) which checks your source list for updates, and downloads if changes are found.
You can find out what blocklist a specific domain was found on. This is useful for troubleshooting websites that may not work properly due to a blocked domain.
You can [watch the log files](https://discourse.pi-hole.net/t/how-do-i-watch-and-interpret-the-pihole-log-file/276) in real time to help debug any issues, or just see what's happening on your network.
If you are having trouble with your Pi-hole, this is the place to go. You can run the debugger and it will attempt to diagnose any issues, and then link to an FAQ with instructions on rectifying the problem.
If run [via the command line](https://discourse.pi-hole.net/t/the-pihole-command-with-examples/738#debug), you will see coloured text, which makes it easy to identify any problems.
After the debugger has finished, you have the option to upload it to our secure server for 48 hours. All you need to do is provide [one of our developers](https://github.com/orgs/pi-hole/teams/debug/members) the unique token generated by the debugger via [one of the various ways of getting in touch with us](#getting-in-touch-with-us).
Pi-hole ships with a [built-in DHCP server](https://discourse.pi-hole.net/t/how-do-i-use-pi-holes-built-in-dhcp-server-and-why-would-i-want-to/3026). This allows you to let your network devices use Pi-hole as their DNS server if your router does not let you adjust the DHCP options.
One nice feature of using Pi-hole's DHCP server if you can set hostnames and DHCP reservations so you'll [see hostnames in the query log instead of IP addresses](https://discourse.pi-hole.net/t/how-do-i-show-hostnames-instead-of-ip-addresses-in-the-dashboard/3530). You can still do this without using Pi-hole's DHCP server; it just takes a little more work. If you do plan to use Pi-hole's DHCP server, be sure to disable DHCP on your router first.
Using [chronometer2](https://github.com/pi-hole/pi-hole/blob/master/advanced/Scripts/chronometer.sh), you can view [real-time stats](https://discourse.pi-hole.net/t/how-do-i-view-my-pi-holes-stats-over-ssh-or-on-an-lcd-using-chronometer/240) via `ssh` or on an LCD screen such as the [2.8" LCD screen from Adafruit](http://amzn.to/1P0q1Fj).
Simply run `pihole -c` for some detailed information.
<sub><ahref="https://www.reddit.com/r/pihole/comments/6ldjna/pihole_setup_went_so_well_at_home_for_the_1st/">Image courtesy of /u/super_nicktendo22</a></sub>
To summarize into a short sentence, the Pi-hole is an **advertising-aware DNS/Web server**. While quite outdated at this point, [this original blog post about Pi-hole](https://jacobsalmela.com/2015/06/16/block-millions-ads-network-wide-with-a-raspberry-pi-hole-2-0/) goes into **great detail** about how it was setup and how it works. Syntactically, it's no longer accurate, but the same basic principles and logic still apply to Pi-hole's current state.
-----
## Pi-hole Projects
- [Docker Pi-hole container (x86 and ARM)](https://hub.docker.com/r/diginc/pi-hole/)
- [Lifehacker: Turn A Raspberry Pi Into An Ad Blocker With A Single Command](https://www.lifehacker.com.au/2015/02/turn-a-raspberry-pi-into-an-ad-blocker-with-a-single-command/)
- [MakeUseOf: Adblock Everywhere: The Raspberry Pi-Hole Way](http://www.makeuseof.com/tag/adblock-everywhere-raspberry-pi-hole-way/)
- [Catchpoint: Ad-Blocking on Apple iOS9: Valuing the End User Experience](http://blog.catchpoint.com/2015/09/14/ad-blocking-apple/)
- [Security Now Netcast: Pi-hole](https://www.youtube.com/watch?v=p7-osq_y8i8&t=100m26s)
- [TekThing: Raspberry Pi-Hole Makes Ads Disappear!](https://youtu.be/8Co59HU2gY0?t=2m)
- [The Defrag Show: Endoscope USB Camera, The Final [HoloLens] Vote, Adblock Pi and more](https://channel9.msdn.com/Shows/The-Defrag-Show/Defrag-Endoscope-USB-Camera-The-Final-HoloLens-Vote-Adblock-Pi-and-more?WT.mc_id=dlvr_twitter_ch9#time=20m39s)
- [Adafruit: Pi-hole is a black hole for internet ads](https://blog.adafruit.com/2016/03/04/pi-hole-is-a-black-hole-for-internet-ads-piday-raspberrypi-raspberry_pi/)
- [Digital Trends: 5 Fun, Easy Projects You Can Try With a $35 Raspberry Pi](https://youtu.be/QwrKlyC2kdM?t=1m42s)
- [Adafruit: Raspberry Pi Quick Look at Pi Hole ad blocking server with Tony D](https://www.youtube.com/watch?v=eg4u2j1HYlI)
- [Devacron: OrangePi Zero as an Ad-Block server with Pi-Hole](http://www.devacron.com/orangepi-zero-as-an-ad-block-server-with-pi-hole/)
- [CryptoAUSTRALIA Blog: How We Tried 5 Privacy Focused Raspberry Pi Projects](https://blog.cryptoaustralia.org.au/2017/10/05/5-privacy-focused-raspberry-pi-projects/)
