Re: Help with pasta usage

[Stefano Brivio <sbrivio@redhat.com>]

Hi Ayon,

On Tue, 20 May 2025 12:09:46 -0230
Ayon T <sanroz.mozan13@gmail.com> wrote:

> Hi,
> 
> I'm sorry for the delayed response. No, I am still using
> 0.0~git20250217.a1e48a0-1. I just meant that I had not used apt for
> installing passt.

...where did you take that package from, though? If it's something like
alvistack (https://github.com/alvistack/passt-top-passt/), there might
be other patches or modified / missing AppArmor profiles, and I can't
really look into that as well (I already maintain official packages, at
least for Debian).

> I had an upgrade planned to Ubuntu 24.10 and after that upgrade, my
> connections to port 53 are being refused when I'm using pasta, leaving me
> unable to use a DNS resolver. I'm not sure why this is. It works fine with
> the default network driver.
> 
> This is not the issue I contacted you with and that's why I'm trying to
> figure out why this is happening myself (albeit with little luck).

I would suggest to start passing the --pcap option to pasta, say:

  podman run --net=pasta:--pcap,/tmp/port53.pcap ...

and then have a look at the resulting packet capture (with Wireshark /
tshark, for example).

As we keep fixing bugs, and we fixed quite a lot of things with UDP
flows since February, an updated package, or even a build from source,
(git clone git://passt.top && cd passt && make && sudo make install)
might be worth a try.

It takes a few seconds to build / install, and can be removed cleanly
with 'sudo make uninstall'.

-- 
Stefano