Public bug reported:
Our VPN provides both IPv4 and IPv6 addresses for the tunnel endpoint.
With the latest openvpn on Bionic, the VPN starts, but no network
connectivity is actually established if the client is accessing from an
IPv6 enabled location; forcing the tunnel endpoint to IPv4 (using its IP
address) resolves the issue.
This worked until very recently.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: openvpn 2.4.4-2ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
Uname: Linux 4.15.0-10-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Mar 15 10:06:12 2018
InstallationDate: Installed on 2016-11-06 (493 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
SourcePackage: openvpn
UpgradeStatus: Upgraded to bionic on 2017-11-16 (119 days ago)
** Affects: openvpn (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug bionic wayland-session
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https://bugs.launchpad.net/bugs/1756032
Title:
No VPN connectivity when accessing tunnel endpoint over IPv6
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