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<p>Hello Marek,</p>
<p>On Tue, Sep 16, 2025 at 12:59:51PM +0000, Marek Küthe wrote:</p>
<blockquote>
<p>naain and I are trying to set up peering, but it’s not working. We
are doing the peering via a WireGuard tunnel. This is working. We can
ping each other’s endpoints without any problems. On my side, it shows
me that I am exporting the routes. However, naain’s bird does not show
any imported routes (despite a filter that accepts everything). We
enabled the debug function for testing purposes and he received
“filtered out” log messages. Neither he nor I can explain this, since
the import filter accepts everything.</p>
</blockquote>
<pre><code>Tue Sep 16 15:00:29 2025 daemon.debug bird: marek_v6.ipv6 < filtered out fdec:a476:db6e::/48 0L 10G unicast
Tue Sep 16 15:00:29 2025 daemon.debug bird: marek_v6.ipv6 < filtered out fdb5:32:ad4a::/48 0L 10G unicast
Tue Sep 16 15:00:29 2025 daemon.debug bird: marek_v6.ipv6 < filtered out fdcb:dded:cbcc::/48 0L 10G unicast
Tue Sep 16 15:00:30 2025 daemon.debug bird: marek_v6.ipv6 < filtered out fdb5:32:ad4a::/48 0L 12G unicast
Tue Sep 16 15:00:30 2025 daemon.debug bird: marek_v6.ipv6 < filtered out fdb5:32:ad4a::/48 0L 11G unicast
Tue Sep 16 15:00:30 2025 daemon.debug bird: marek_v6.ipv6 < filtered out fdcb:dded:cbcc::/48 0L 12G unicast
Tue Sep 16 15:00:30 2025 daemon.debug bird: marek_v6.ipv6 < filtered out fdec:a476:db6e::/48 0L 12G unicast
Tue Sep 16 15:00:30 2025 daemon.debug bird: marek_v6.ipv4 < filtered out 172.23.126.128/27 0L 12G unicast
Tue Sep 16 15:00:30 2025 daemon.debug bird: marek_v6.ipv6 < filtered out fdcb:dded:cbcc::/48 0L 11G unicast
Tue Sep 16 15:00:30 2025 daemon.debug bird: marek_v6.ipv6 < filtered out fdec:a476:db6e::/48 0L 11G unicast
Tue Sep 16 15:00:30 2025 daemon.debug bird: marek_v6.ipv4 < filtered out 172.23.126.128/27 0L 11G unicast
Tue Sep 16 15:01:01 2025 daemon.debug bird: marek_v6.ipv4 < filtered out 172.21.100.24/29 0L 11G unicast
Tue Sep 16 15:01:01 2025 daemon.debug bird: marek_v6.ipv6 < filtered out fd40:e3b7:1d77:1234::/64 0L 11G unicast
Tue Sep 16 15:01:01 2025 daemon.debug bird: marek_v6.ipv6 < filtered out fd40:e3b7:1d77:1234::/64 0L 10G unicast
Tue Sep 16 15:01:11 2025 daemon.debug bird: marek_v6.ipv4 < filtered out 172.20.212.0/26 0L 10G unicast
Tue Sep 16 15:01:11 2025 daemon.debug bird: marek_v6.ipv6 < filtered out fdcc:abcd:cafe::/48 0L 13G unicast
Tue Sep 16 15:01:16 2025 daemon.debug bird: marek_v6: Sending KEEPALIVE</code></pre>
<p>This is admittedly cryptic but <code><</code> is export and
<code>></code> is import, therefore what you are looking at are logs
of BIRD refusing to export non-own routes, as configured.</p>
<p>You’ll need to look for <code>></code> records for import, and
probably <code>tcpdump</code> might help to check whether it actually
comes out from the right link. With WireGuard though … are you sure that
the packets actually come through? I remember having weird MTU issues
with my wireguard setup, and TCP very easily sends packets big enough to
hit it.</p>
<p>Have a nice day!<br />
Maria</p>
<p>–<br />
Maria Matejka (she/her) | BIRD Team Leader | CZ.NIC, z.s.p.o.</p>
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