Ipsec tunnel mode vs ip in ip with ipsec transport

Discussion in 'Linux Networking' started by Reji, Sep 20, 2011.

  1. Reji

    Reji Guest

    Is there any difference/advantage in using an "ip in ip tunnel
    encrypted with ipsec transport mode" over using directly the "ipsec
    tunnel mode".
     
    Reji, Sep 20, 2011
    #1
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  2. Reji

    KR Guest

    An IP in IP tunnel has a tunnel device at each end, and the tunnel
    creates a virtual point-to-point connection between them. The tunnel may
    then be encrypted using IPsec transport mode. Traffic is sent through
    the tunnel by routing it to the IP address of the tunnel interface at
    the other end.

    In IPsec tunnel mode, it appears to the routers as if traffic is simply
    routed to the existing gateway. There is no tunnel interface, and the
    tunnel definitions at each end decide which traffic is to go through the
    tunnel.
     
    KR, Sep 20, 2011
    #2
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