Updated readme with correct instructions for freeing port 53 on Fedor…

…a 33+.

Signed-off-by: Justin Ward <[email protected]>

README.md

@@ -162,7 +162,7 @@ Here is a rundown of other arguments for your docker-compose / docker run.
 - Docker's default network mode `bridge` isolates the container from the host's network. This is a more secure setting, but requires setting the Pi-hole DNS option for _Interface listening behavior_ to "Listen on all interfaces, permit all origins".
 - If you're using a Red Hat based distribution with an SELinux Enforcing policy, add `:z` to line with volumes.
 
-### Installing on Ubuntu or Fedora
+## Installing on Ubuntu or Debian
 
 Modern releases of Ubuntu (17.10+) and Fedora (33+) include [`systemd-resolved`](http://manpages.ubuntu.com/manpages/bionic/man8/systemd-resolved.service.8.html) which is configured by default to implement a caching DNS stub resolver. This will prevent pi-hole from listening on port 53.
 The stub resolver should be disabled with: `sudo sed -r -i.orig 's/#?DNSStubListener=yes/DNSStubListener=no/g' /etc/systemd/resolved.conf`.
@@ -193,6 +193,24 @@ If you choose to disable the service, you will need to manually set the nameserv
 
 Users of older Ubuntu releases (circa 17.04) will need to disable dnsmasq.
 
+## Installing on Fedora
+Modern releases of Fedora (33+) include systemd-resolved, which is configured by default to implement a caching DNS stub resolver. This may conflict with Pi-hole's DNS server by preventing it from listening on port 53. To avoid this conflict, you need to disable the DNS stub resolver.
+Disable the DNS Stub Resolver
+
+Run the following commands to free port 53 and allow pihole to run:
+1. Ensure the directory /etc/systemd/resolved.conf.d exists.
+2. Create a configuration file (/etc/systemd/resolved.conf.d/10-pihole.conf) to override the default settings.
+3. Add the DNSStubListener=no directive, which disables the local DNS stub listener.
+4. Restart `systemd-resolved` to apply the new configuration.
+```
+[ -d /etc/systemd/resolved.conf.d ] || sudo mkdir /etc/systemd/resolved.conf.d
+echo '[Resolve]' | sudo tee /etc/systemd/resolved.conf.d/10-pihole.conf
+echo 'DNSStubListener=no' | sudo tee -a /etc/systemd/resolved.conf.d/10-pihole.conf
+sudo systemctl restart systemd-resolved
+```
+
+Note that by default in Fedora, /etc/resolv.conf already points to /run/systemd/resolve/resolv.conf, so DNS resolution continues to work even when the stub listener is disabled.
+
 ## Installing on Dokku
 
 [@Rikj000](https://github.com/Rikj000/) has produced a guide to assist users [installing Pi-hole on Dokku](https://github.com/Rikj000/Pihole-Dokku-Installation).