Thanks, Ľubomír Mlích! I remember trying to inspect /var/log/syslog, but I probably felt discouraged when I saw that the messages about the VPN connection could be mixed with other messages. I recognize I didn't put much effort into checking that log; I just didn't have the right state of mind or the patience to troubleshoot in that way.
In any case, I found some useful hints for solving the problem by reading the discussion at the URL below. https://github.com/nm-l2tp/NetworkManager-l2tp/issues/230 What I ended up doing was replacing libreswan with strongswan and disabling MPPE - an IPsec tunnel is enabled. Disabling MPPE was the key step - about replacing libreswan, I don't know. The issue is solved for me, though I wish I'd been more "scientific" about it so I could explain exactly what wasn't working and why. Right now, I'm not willing to spend more time troubleshooting just to figure that out. Thanks! Andrea ** Bug watch added: github.com/nm-l2tp/NetworkManager-l2tp/issues #230 https://github.com/nm-l2tp/NetworkManager-l2tp/issues/230 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2068687 Title: L2TP VPN is not working in Ubuntu 24.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/golang-github-katalix-go-l2tp/+bug/2068687/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
