On Thu, 2018-03-08 at 22:16 +0100, Thomas Haller wrote:
> 
> Hi,
> 
> I think on recent versions it should work mostly similar. On the other
> hand, 1.2 is really old. It would be better to start testing on master,
> fixing it there, and then see what it needs to get it working on older
> versions.

Yeah. In fact I'm stuck with an even older version of NetworkManager
than the latest for Ubuntu 16.04 because all the latest packages have a
regression — they *used* to make all VPN DNS traffic go to the VPN, but
if I let it update then some of the DNS traffic escapes to the local
nameservers on my network.

> This requirement that NM needs to add a route for the external gateway
> is quite annoying. I wish there would be a special route type that
> says, "do not ever route to destination $EXT_GW/32 via this interface,
> and continue route-lookup". There are route types like "throw", but
> that is only for policy routing and not really a nice solution. The
> advantage is, that the NetworkManager can add this route to the VPN
> device, instead of searching for some underlying device where it thinks
> the gateway is reachable.

In my case it seems to think the gateway is reachable over 'vpn0'.
Which it thinks is a separate connection from 'My VPN'. I wonder if
that isn't helping...

$ nmcli con
NAME                             UUID                                  TYPE     
        DEVICE    
My VPN                           bda8e791-d172-491d-b41e-35aa8a26fb3d  vpn      
        vpn0      
Wired connection 1               2415d366-c770-4fd1-9f5a-403e417998af  
802-3-ethernet   enp0s31f6 
virbr0                           491c2da0-a8b2-4a8f-8e88-9ad0ea56f282  bridge   
        virbr0    
vpn0                             ddacf9cb-0ea3-4317-8488-2f9ed0888c3a  tun      
        vpn0      

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