Hi,
b) Can you compare the output on connection between both kernel versions?
Any specific commands I can try? ping 9.9.9.9 simply does not work.
$ ping 9.9.9.9
PING 9.9.9.9 (9.9.9.9) 56(84) bytes of data.
I just reproduced it on our staging server as well.
root@vpn-staging:~# uname -a
Linux vpn-staging 6.12.88+deb13-cloud-amd64 #1 SMP PREEMPT_DYNAMIC
Debian 6.12.88-1 (2026-05-15) x86_64 GNU/Linux
root@vpn-staging:~# apt policy linux-image-cloud-amd64
linux-image-cloud-amd64:
Installed: 6.12.88-1
Candidate: 6.12.88-1
Sorry, this is not actionable. And I don't think it's a common problem,
we were extra careful due to your report upgrading our eduVPN servers
and neither we nor someone else saw any issues so far.
I need
- Cnnection logs (working and not working) ... openvpn usually dumps a
ton of stuff on startup and connect, either in syslog or on stdout. You
might need "verb 3" in the config
- does ping on the server side IP in the transport network work? If not,
does tcpdump see it on the tunnel in the client and on the tunnel in the
server?
Bernhard
