RE: [fw-wiz] Pix VPN endpoint and split-tunnel

From: Alan Holmes (
Date: 10/14/05

  • Next message: Victor Williams: "Re: [fw-wiz] Pix VPN endpoint and split-tunnel"
    To: "'Hughes, Chris'" <>, <>
    Date: Thu, 13 Oct 2005 19:52:05 -0500

    The 7.0 PIX code supports forwarding VPN traffic out the same interface that
    it arrived on, spoke -to -spoke routing. It also supports split-tunneling by
    forwarding clear-text traffic out the Internet after applying firewall

    I think the command is something like same-security-interface
    intra-interface. I haven't configured it yet. I expect to receive a couple
    ASAs in the next couple weeks and am looking forward to testing this.


    -----Original Message-----
    [] On Behalf Of Hughes,
    Sent: Wednesday, October 12, 2005 10:24 AM
    To: Paul Melson;
    Subject: RE: [fw-wiz] Pix VPN endpoint and split-tunnel

    That's pretty much what I read. I thought they may have provided a fix by
    now. As for the workarounds, this is for a business partner network and
    I've already presented them with the "spend" option and they don't want to.

    Another reply I got here from Simon expressed the possibility that PIX 7.x
    supports this. (split horizon?)


    - Chris

    -----Original Message-----
    From: Paul Melson []
    Sent: Wednesday, October 12, 2005 10:45 AM
    To: Hughes, Chris;
    Subject: RE: [fw-wiz] Pix VPN endpoint and split-tunnel

    -----Original Message-----
    Subject: [fw-wiz] Pix VPN endpoint and split-tunnel

    > I am trying to configure a cisco pix as a vpn endpoint for the cisco
    client and
    > would like to force the client to use the corporate network for
    access. I
    > don't want to allow split-tunnel. I cant find any info on how to do
    Is split
    > tunnel the only way to give a vpn client internet access once they are

    The short answer is yes. PIX-fu rule #1: the PIX is not a router. It can't
    take traffic that arrives on one interface and pass it back out that same
    interface, even when the traffic arrives via VPN tunnel. That said, you can
    sort of solve this problem by having the clients use a proxy server while
    connected via full tunnel. There may or may not be an elegant way to
    automate this for your road warriors, but this would really be independent
    of anything the PIX or VPN client do. (Think login scripts, Group Policy,

    If it's a big enough issue that you're willing to spend time and resources
    on it, I would recommend looking at the VPN3K concentrators (or ASA 5500?).
    They can do exactly what you're asking for, plus they possess a number of
    other features for managing VPN client users that the PIX doesn't have.
    (Like dynamic VPN profile assignment via RADIUS.)


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