I have a homenetwork 192.168.1.0/24 with gteway 192.168.1.1 and a remote network with the same parameters. Now I want to create a OpenVPN tunnel between those networks.

I have no problems with Windows, because Windows routes everything to 192.168.1.0/24 except 192.168.1.1 throught the tunnel.

On MacOS X however I see the folling line in the Details window:

2010-05-10 09:13:01 WARNING: potential route subnet conflict between local LAN [192.168.1.0/255.255.255.0] and remote VPN [192.168.1.0/255.255.255.0]

When I list the routes I get the following:

Internet:
Destination        Gateway            Flags    Refs      Use  Netif Expire
default            192.168.1.1        UGSc       13        3    en1
127                localhost          UCS         0        0    lo0
localhost          localhost          UH         12     3589    lo0
169.254            link#5             UCS         0        0    en1
192.168.1          link#5             UCS         1        0    en1
192.168.1.1        0:1e:e5:f4:ec:7f   UHLW       13       17    en1   1103
192.168.1.101      localhost          UHS         0        0    lo0
192.168.6          192.168.6.5        UGSc        0        0   tun0
192.168.6.5        192.168.6.6        UH          1        0   tun0

My Interfaces are

en1 - My local Wifi network
tun0 - The tunnel interface

As can be seen from the routes above there is no entry for 192.168.1.0/24 that routes the traffic through the tunnel interface.

When I manually route a single IP like 192.168.1.16 over the tunnel gateway 192.168.6.6, this works.

Q: How do I set up my routes in MacOS X for the same behaviour as on windows, to route everything except 192.168.1.1 through the tunnel, but leave the default gateway to be my local 192.168.1.1 ?