network-manager-l2tp's MPPE support has been broken for over 10 years when Compression Control Protocol (CCP) was disabled with the following commit in its source code:
https://github.com/nm-l2tp/NetworkManager-l2tp/commit/5fe98f70344e842faa28014be7ba259c2db7ae8b MPPE negotiations need to happen within CCP and was fixed with the version of network-manager-l2tp that shipped with Ubuntu 24.04. MPPE generally only works with L2TP servers that don't use IPsec. ** Changed in: network-manager-l2tp (Ubuntu) Assignee: (unassigned) => Douglas Kosovic (dkosovic) ** Changed in: network-manager-l2tp (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2085749 Title: Cannot Connect to VPN after Upgrading to 24.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager-l2tp/+bug/2085749/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
