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From: "Kristof Provost" <kristof@sigsegv.be>
To: "Peter Ludikovsky" <peter@ludikovsky.name>
Cc: freebsd-questions@freebsd.org
Subject: Re: UDP connections from NAT'ed jails
Date: Mon, 26 Feb 2018 18:43:23 +0545
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On 26 Feb 2018, at 18:11, Peter Ludikovsky wrote:
> I'm experimenting with jails in preparation for moving my home server
> from Linux to FreeBSD. I'm doing this from within a VirtualBox VM, 
> since
> it's easier to revert to a previous state in case I break something.
>
> My biggest issue ATM is that my first jail can't resolve any host. TCP
> and ICMP packets pass without issue, but DNS requests time out. I
> checked with tcpdump on both the outside interface of the VM and of 
> the
> host, neither show any DNS requests. Both hosts use 9.9.9.10 as the 
> DNS
> server in /etc/resolv.conf.
>
…
> Anyone got a pointer on what's going wrong here?
>
Hmm. That’s interesting. Can you tcpdump on the host to see what’s 
going on with your DNS packets?

Also, I’d try to remove the ‘set skip on lo’ pf rule.

Regards,
Kristof