15

I'm currently running an OpenVPN server for multiple clients. All traffic is directed through the VPN (it's set up as gateway; push "redirect-gateway def1").

So far, all is working fine. However, I'd like to connect a couple of servers to this virtual private network, without these servers using the OVPN daemon as gateway.

These servers have to be accessible from both their WAN as well as their LAN IP address. Certain services will be accessible only from the LAN side.

Is there any way, for a client, to ignore the push redirect-gateway option?

Kind regards, Tuinslak

  • Great question... I was asking myself exactly the same thing. – Antoine Benkemoun Apr 6 '10 at 8:05
15

Just add "route-nopull" to the client openvpn config, then all pushed commands from the server are ignored. To get access to the local net, you must now add e.g. "route 192.168.5.0 255.255.255.0" to the client openvpn config, if the local net you want to connect to is 192.168.5.0/24.

  • This causes some errors on connect but works as intended :) – Brian Ramsey Nov 1 '17 at 23:09
  • The best option nowadays (2.4 or later) would be pull-filter ignore redirect-gateway – mwfearnley Dec 10 '18 at 10:26
8

if 'redirect-gateway' is required for some but not all clients then add a 'client-config-dir' option e.g.

  client-config-dir /etc/openvpn/clients

and inside that directory put files for each client CN, e.g. file Client1 would contain

  push-reset

that way the servers don't get the 'redirect-gateway' pushed by default.

HTH

  • 1
    I guess this would reset every pushed option (including DNS servers)? – Tuinslak Feb 26 '12 at 0:59
2

just replace the default gateway in --up script an you are all set. You don't even have to do anything in --down (I think) or just set it to up.sh as well.

in client.conf

up up.sh

in up.sh (chmod +x)

#!/bin/bash
/sbin/ip route replace default 1.2.3.4

where 1.2.3.4 is your client's default gateway

1

It sounds like the exact solution you want is to put this line in your OpenVPN config:

pull-filter ignore redirect-gateway

Literally, it filters the options it pulls from the server, and ignores the redirect-gateway option.

According to https://community.openvpn.net/openvpn/wiki/IgnoreRedirectGateway, this was added in OpenVPN 2.4, which was released around December 2016.

-1

Remvoe "redirect-gateway" option in the client configure file, the client's default gateway won't change anymore. tested under Archlinux/OpenVPN 2.3.2.

  • I guess this solution would depend on whether the gateway is configured on the client, or pushed from the server. – mwfearnley Dec 10 '18 at 9:45

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