OpenVPN on top of Ipsec - route conflict

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OpenVpn Newbie
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Joined: Thu Jul 30, 2020 2:03 pm

OpenVPN on top of Ipsec - route conflict

Post by Ugru » Thu Jul 30, 2020 2:28 pm

I have a successful IPsec tunnel working using the Anyconnect client on Ubuntu 18.
I have an Open VPN connection sucessfully authenticated over the top of this IPSEC.
How ever my problem lies in the fact that although the OpenVPN client adds a route to send the tunnel related traffic down the tun0 dev, for some reason there is also a routed added above this that sends the same traffic down the already created cisco tunnel device.

Ip route:

A.B.C.D/X dev cscotun0 proto unspec scope link
A.B.C.D/X dev tun0 proto unspec scope link

I make an attempt to delete the link on the cisco tu device with:
"sudo ip route del A.B.C.D/X dev cscotun0"

which does not return any errors, but does not delete the route either !

Any ideas please how I can stop the cisco tun device from inheriting this route, or how to remove it ?

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OpenVPN Protagonist
Posts: 7808
Joined: Fri Jun 03, 2016 1:17 pm

Re: OpenVPN on top of Ipsec - route conflict

Post by TinCanTech » Fri Jul 31, 2020 12:30 pm

If you need expert help then I am available for hire.

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