OpenVPN fd=8,Code=13 error

[Darkvader]

Hello, I would like some help figuring out why I have this particular error on a previously fully working openvpn config.

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2026-08-13T10:50:47 Error openvpn_server1 Connection Attempt write UDPv4: Permission denied (fd=8,code=13)
this line will fill the openvpn server logs and no clients can connect. I've spent the last hour re-creating the install and manually transferring the openvpn config over, only for it to do the same thing on the new install.
all instances are affected too.

over the last week, this config worked flawlessly but after an update it seems to be completely borked. I also can't seem to get it working by changing options around, it just seems to give the same error constantly now.

please help.

[Monviech (Cedrik)]

What was the OPNsense version where it worked, and in which version do you have the above issue?

[Darkvader]

26.1.3 was where it was set up and worked fine. I had the system get a bit stuck between versions for a little while (my 5g connection never seems to finish an update) so latest packages were installed even with the .3 kernel and base, I then did a manual upgrade to 26.1.11 where it stopped working, then in re-imaging went to 26.7 which also doesn't work.

I can send you my config if you'd like.

[Monviech (Cedrik)]

Hmm thats a rather large timeframe.

A config won't help as it could be environment or hardware specific.

Maybe somebody else has the same issue and reports it here as well.