Public bug reported:
Setup:
Host lan: 192.168.0.238/24
Host Default gw: 192.168.0.1
ip route:
default via 192.168.0.1 dev eno1 proto dhcp metric 100
169.254.0.0/16 dev eno1 scope link metric 1000
192.168.0.0/24 dev eno1 proto kernel scope link src 192.168.0.238 metric 100
Primary OpenVPN (check "Use this connection only for resources on its network"):
server ip: public a.b.c.d
OpenVPN Tunnel: 192.168.1.0/24
routes pushed: 192.168.100.0/24
First VPN works OK:
default via 192.168.0.1 dev eno1 proto dhcp metric 100
169.254.0.0/16 dev eno1 scope link metric 1000
192.168.0.0/24 dev eno1 proto kernel scope link src 192.168.0.238 metric 100
192.168.0.1 dev eno1 proto static scope link metric 100
192.168.100.0/24 via 192.168.10.1 dev tun0 proto static metric 50
a.b.c.d via 192.168.0.1 dev eno1 proto static metric 100
Secondary OpenVPN (check "Use this connection only for resources on its
network"):
server ip: private 192.168.100.10
OpenVPN Tunnel: 192.168.20.0/24
routes pushed: 192.168.200.0/24
Second VPN Connect OK, routing table is wrong:
default via 192.168.0.1 dev eno1 proto dhcp metric 100
192.168.200.0/24 via 192.168.20.1 dev tun1
192.168.20.0/24 dev tun1 proto kernel scope link src 192.168.20.59
169.254.0.0/16 dev eno1 scope link metric 1000
192.168.0.0/24 dev eno1 proto kernel scope link src 192.168.0.238 metric 100
192.168.0.1 dev eno1 proto static scope link metric 100
192.168.100.0/24 via 192.168.10.1 dev tun0 proto static metric 50
a.b.c.d via 192.168.0.1 dev eno1 proto static metric 100
192.168.100.10 via 192.168.0.1 dev eno1 proto static metric 100 <- this is
wrong, the openVPN#2 Gateway is not on the local lan
Correct routing table using "sudo /usr/sbin/openvpn
/path/to/config.openvpn" (same a Network Manager)
default via 192.168.0.1 dev eno1 proto dhcp metric 100
192.168.200.0/24 via 192.168.20.1 dev tun1
192.168.20.0/24 dev tun1 proto kernel scope link src 192.168.20.59
169.254.0.0/16 dev eno1 scope link metric 1000
192.168.0.0/24 dev eno1 proto kernel scope link src 192.168.0.238 metric 100
192.168.0.1 dev eno1 proto static scope link metric 100
192.168.100.0/24 via 192.168.10.1 dev tun0 proto static metric 50
a.b.c.d via 192.168.0.1 dev eno1 proto static metric 100
It seems that Network Manager add a wrong additional route not added by
the openvpn bin:
192.168.100.10 via 192.168.0.1 dev eno1 proto static metric 100
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: openvpn 2.4.7-1ubuntu2
ProcVersionSignature: Ubuntu 5.8.0-44.50~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-44-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Mar 5 12:44:39 2021
InstallationDate: Installed on 2021-02-19 (13 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64
(20210209.1)
ProcEnviron:
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=it_IT.UTF-8
SHELL=/bin/bash
SourcePackage: openvpn
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: openvpn (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
** Summary changed:
- Network Manager OpenVPN nested connection fail to setup routes correctly
+ Network Manager OpenVPN nested connections fail to setup routes correctly
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https://bugs.launchpad.net/bugs/1917887
Title:
Network Manager OpenVPN nested connections fail to setup routes
correctly
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