One VPN connection not working after upgrading to Fedora 39

I have been running an L2TP over IPSec VPN for a while now. I had two connections set up. Both of them connect to the same server. One was a full VPN and all traffic was routed through the VPN. The other was a split VPN where only internal traffic destined for within the private network was routed to the VPN.

This had been working well for years. Then last week I upgraded from F38 to F39. After the update, only one of the two connections work - the full VPN. I an not sure what is causing this.

I’ve tried making an entirely new *.nmconnection in /etc/NetworkManager/system-connections based off of the working, but unfortunately that too fails to connect.

When attempting to connect, it instantly stops attempting to connect, I am not sure where to go to look for errors or logs though if my connection is erroring out that quickly.

How can I troubleshoot the issue further?

You can look at the NetworkManager-l2tp related log output with:

journalctl --no-hostname _SYSTEMD_UNIT=NetworkManager.service + SYSLOG_IDENTIFIER=pppd

also look at the routing table to see if you can spot issues:

ip address show; ip route show table all; ip rule show
1 Like