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Home » Kerio User Forums » Kerio Control » Linux - How to use kvnet (vpn interface ) as default route ? (unable to use vpn virtual interface as default route )

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I am struggling to use Kerio VPN on Linux.

I can use it in the sense that I can connect to my office LAN, however I cannot seem to use the route as my system's default route....

In this example I am connecting via mobile internet to the VPN server - as mentioned I can access the office LAN ( - but cannot use this connection as the default route

(i.e - all I am doing is trying to be able to browse on my desktop via the office connection...)

Here is my ifconfig

(I have changed the ip addresses for security..)

kvnet Link encap:Ethernet HWaddr 72:01:51:e3:fc:44
inet addr: Bcast: Mask:
inet6 addr: fe80::7001:51ff:fee3:fc44/64 Scope:Link
RX packets:92 errors:0 dropped:0 overruns:0 frame:0
TX packets:125 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:9474 (9.4 KB) TX bytes:13423 (13.4 KB)

lo Link encap:Local Loopback
inet addr: Mask:
inet6 addr: ::1/128 Scope:Host
RX packets:81 errors:0 dropped:0 overruns:0 frame:0
TX packets:81 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:6331 (6.3 KB) TX bytes:6331 (6.3 KB)

usb0 Link encap:Ethernet HWaddr 02:e3:c3:30:0e:2f
inet addr: Bcast: Mask:
inet6 addr: fe80::e3:c3ff:fe30:e2f/64 Scope:Link
RX packets:1564 errors:0 dropped:0 overruns:0 frame:0
TX packets:1384 errors:4 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1105539 (1.1 MB) TX bytes:113675 (113.6 KB)

And here is my 'route -n'

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface UG 0 0 0 usb0 U 7 0 0 usb0 U 1000 0 0 usb0 U 0 0 0 kvnet UG 1 0 0 kvnet UG 1 0 0 kvnet

How can I make it so that traffic from my internet connection - i.e usb0 uses my vpn (kvnet) route -

i.e so if I went to - it would show the ip from my office?

Is this possible with the Linux VPN client ?? I know that openVPN works that way, I also know the Windows client you can also.

Any help would be good, we may be forced to change to a different solution (openVPN for example does allow you to use the VPN link as the default route , and thats free...)


[Updated on: Thu, 25 October 2012 09:50]

James Bobby

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You should be able to set that on the VPN Server side, there's a box for that in the newer versions, alternatively add two custom routes. mask mask

That should make so that all traffic goes through the VPN.
Lucian Maly (Kerio)

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Kerio Technologies AU Pty Ltd.

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Thanks for the responses.

How do I go about changing the default route in Linux though ?

I often do it by deleting the default route and adding another - with the VPN though if I delete the default route I lose the VPN connection (sort of a catch 22 ...)

Any help would be welcomed

At present I am having to use NXserver (easily the best remote desktop software you can use..) over the VPN link which is o.k - but it would be infinitely easier to have a direct connection rather than hopping onto my work desktop first.

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