Hi Piotr,
On 13/05/2026 13:20, Piotr Dobrogost wrote:
Hi,
After I upgraded from OpenVPN 2.6 to OpenVPN 2.7 (as a part of the
upgrade from Fedora 43 to Fedora 44), the OpenVPN tunnel that had been
working without problems for months stopped working. The log of
OpenVPN looks normal, with the "Initialization Sequence Completed"
entry that always signals an established tunnel. However, no data gets
through; there is no response when pinging the tunnel’s remote
endpoint or remote DNS server.
After I disabled DCO on the client side (--disable-dco), the tunnel
started to work.
My question is: how could I find out that the culprit is DCO in the first place?
I'm attaching the log.
I raised this issue first at
https://discussion.fedoraproject.org/t/openvpn-tunnel-stopped-working-after-upgrade-to-fedora-44/191218
The log doesn't show anything useful.
While pinging 10.92.32.1, does `dmesg` report any error?
--
Antonio Quartulli
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