This is fixed in kinetic/lunar/mantic, I have not checked older releases. If you want to provide an update for an older stable release, please provide debdiffs against that version and follow the process in
https://wiki.ubuntu.com/StableReleaseUpdates ** Changed in: ppp (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to ppp in Ubuntu. https://bugs.launchpad.net/bugs/1921398 Title: No dns resolution after closing a vpn/sstp connection Status in ppp package in Ubuntu: Fix Released Bug description: The fix for the following issue closes it for nm-pptp-service-* connections, however; it is still a problem for users using network- manager-sstp. You use network-manager-sstp, connect to your VPN server. Then disconnect and you now can't lookup any hostnames. Original problem #1778946 No dns resolution after closing a vpn/pptp connection This is still a problem for sstp users. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ppp/+bug/1921398/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
