The bug seems to be rather global in NetworkManager. It also happens in
n-m-openvpn:
VPN disconnected:
celestia:~# ip ro
192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.137 metric 2
default via 192.168.1.1 dev wlan0 proto static
VPN connected:
celestia:~# ip ro
x.x.x.x via 192.168.1.1 dev wlan0 proto static
x.x.x.x via 192.168.1.1 dev tun0 proto static
192.168.1.1 dev tun0 proto static scope link
10.0.1.1 dev tun0 proto kernel scope link src x.x.x.x
x.x.x.x/x via 10.0.1.1 dev tun0 proto static
192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.137 metric 2
default via 192.168.1.1 dev wlan0 proto static
The third line must not be there, otherwise I can connect neither to VPN hosts
nor to other hosts
in the net.
The hack-solution is to add these:
vpn-up)
/bin/ip ro del 192.168.1.1 dev tun0
;;
to /etc/NetworkManager/dispatcher.d/01ifupdown but the proper solution is not
to add
broken routes in the first place.
--
NetworkManager add unnecessary route entry for VPN connection
https://bugs.launchpad.net/bugs/301669
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