What source to allow traffic from IPFire itself only?

Networking DNS
1

Hello,

What Source should I use in a Firewall rule which would only allow outbound internet traffic from IPFire itself?

I’d like to ensure all my internal devices use IPFire for DNS.
So I’ve tried adding rules to block:

  • UDP/53, TCP/53 and TCP/853
  • TCP/443 and UDP/443 to known public DNS servers

…however I can’t seem to find the right logic to allow only IPFire itself to keep making DNS queries.

If I allow “Interface RED” then I actually permit all DNS from internal devices in the process.

Thank you!

2

Looks like “Interface RED” is correct and my testing was mistaken.

Sorry!

PS: It would give me confidence if someone could please confirm this anyway! :smiley:

3

Have you read the following documentation page?

Regards

1 Like