Routing packets to IPsec tunnel


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Thread: Routing packets to IPsec tunnel

  1. #1
    Join Date
    May 2013
    Posts
    1

    Routing packets to IPsec tunnel

    Hello,

    i have following situation. I have 2 servers with public IP and i created IPsec site-to-site VPN. On 2nd server i am running OpenVPN server. How can i force 1st server that packets destined for OpenVPN are forced into the ipsec tunnel? IPsec is configured in transport mode.

    Thanks

  2. #2
    Join Date
    Oct 2000
    Location
    Sweden
    Posts
    494
    If I get you right, what you do is add a route on Server1.
    Like so:
    * OpenVPN uses adresses 10.10.10.1 - 10.10.10.23/24
    * Ip on Server2 for ipsec: 192.168.10.2
    On Server1 you add a route to 10.10.10.0/24 via 192.168.10.2
    The command, not tested taken from memory! "route add -net 10.10.10.0 netmask 255.255.255.0 192.168.10.2"
    Server2 should already know about the OpenVPN network so nothing need to be done there.
    --- Edit:
    Also, if there are other networks behind OpenVPN on Server2 then add them in the same way. Like "route add -net 172.16.5.0 netmask 255.255.255.0 192.168.10.2"
    Last edited by x; 05-18-2013 at 04:11 PM.
    In pingvino veritas!

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