On Mon, 2017-01-23 at 23:34 +0900, Tomasz Chmielewski wrote:
> I have a VPN server which uses "push route..." options to push
> specific 
> routes to the clients:
> 
> # testing1
> push "route 10.11.0.0 255.255.255.0"
> 
> # testing2
> push "route 10.12.0.0 255.255.255.0"
> 
> # testing3
> push "route 10.13.1.0 255.255.255.0"
> 
> 
> The same config file works correctly with command line openvpn on
> Linux 
> (openvpn --config some.conf), with OpenVPN client for Windows, with 
> OpenVPN client for Mac (TunnelBlick), with OpenVPN clients for
> Android 
> and iOS - the routes are pushed to the clients. However, it does not 
> work when the config is imported via NetworkManager (used version
> 1.2.6 
> on Ubuntu 16.10, but also tried several earlier Ubuntu versions, to
> no 
> avail).
> 
> 
> To reproduce:
> 
> case 1) in NM, import a openvpn config file where the server uses
> "push 
> route..." option, but is *not* a default gateway (i.e. no "push 
> redirect-gateway..." on the server).
> 
> Expected result: config file is imported, when we initiate the 
> connection via NM, the routes pushed by the server are applied on
> the 
> client
> 
> Real result: NM routes *all* traffic through the established
> connection. 
> There is no connectivity anywhere anymore (device is "offlined").
> 
> 
> 
> case 2) in NM, import a openvpn config file where the server uses
> "push 
> route..." option, but is *not* a default gateway (i.e. no "push 
> redirect-gateway..." on the server).
> Additionally, in IPv4 settings -> Routes for this OpenVPN config, we 
> select "Use this connection only for resources on its network".
> 
> Expected result: config file is imported, when we initiate the 
> connection via NM, the routes pushed by the server are applied on
> the 
> client
> 
> Real result: routes pushed by the server are not applied on the
> client.
> 
> 
> 
> Please advise how to use NetworkManager for OpenVPN servers which
> are 
> not default gateways and which push their own routes.
> 

Hi,

whether the VPN gets the default route, depends on the (inverse)
"ipv4.never-default" setting. See `nmcli connection show "$MY_VPN"`


Try to enable debug-logging of the VPN server:

  sudo nmcli logging general level TRACE domains ALL:VPN_PLUGIN

(you need to re-activate the VPN connection for the change to take
effect).
(don't send the logfile with VPN_PLUGIN domain enabled, because it
might contain private data)


The "import" step is entirely separate from the later activation
handling. That is, during import, the ovpn file is transformed to a
NetworkManager connection profile. Whether you import a ovpn or click
it manually makes no difference for the activation.
Of course, it would be interesting *what* you actually import, and how
NM's connection profile looks after the import step.


best,
Thomas

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