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DNS queries being blocked

Posted: 26 Apr 2022, 00:43
by chadreitsma
Hey guys,
Is there a way to open DNS queries (port 53) globally, while still using CC_ALLOW_FILTER = US,CA for the rest of the ports?

We have some customers who's mail is getting blocked because servers outside of US/CA can't query the DNS to get the MX entries.

Re: DNS queries being blocked

Posted: 28 Apr 2022, 12:45
by mbrando
Try this in the allow rules.

tcp|in|d=53|s=0.0.0.0
tcp|out|d=53|s=0.0.0.0

Re: DNS queries being blocked

Posted: 11 May 2022, 00:18
by chadreitsma
Thanks mbrando!

We ended up switching the user's DNS back to their domain registrar, so they can manage it, but I'll give this a shot!