When you say the problem occurs with any AnyConnect client, do you mean the official client as well? If so then this is probably not a bug in NetworkManager or OpenConnect. Do the same symptoms occur when connecting with OpenConnect directly on the command line instead of through NetworkManager?
** Changed in: network-manager-openconnect (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1507341 Title: connection via openconnect halts after 2-3 minutes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager-openconnect/+bug/1507341/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs