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While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1800542
and then change the status of the bug to 'Confirmed'.
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to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
** Changed in: network-manager-openvpn (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1800542
Title:
OpenVPN connection not stable after upgrade to 18.10 (udp, ipv6)
Status in network-manager-openvpn package in Ubuntu:
Incomplete
Bug description:
After upgrade to Ubuntu 18.10, my connection to my employer's VPN
server has become unstable.
The server provides both ipv4 and ipv6 endpoints. Since I have global
ipv6 at home, my client defaults to connecting over ipv6.
The connection consistently drops after only a few minutes of being
connected.
If I force the connection to use ipv4 (by hard-coding the host
resolution in /etc/hosts), the connection is stable.
If I use ipv6 and force proto-tcp=yes, the connection is stable.
If I use the default ipv6 and udp, the connection is not stable.
Using tcp for VPNs is suboptimal. Hard-coding addresses in /etc/hosts
is suboptimal.
This may be a bug in openvpn rather than in network-manager-openvpn,
but I'm starting here.
It's possible there are pathMTU issues involved, but I reproduced this
same problem when I was on a different network from my home network
(though I did not confirm, when I had access to this other network,
that it was ipv6-enabled).
I will work on getting more details about both sides of the network to
try to debug this.
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