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ISA 2006 Branch office connectivity issue

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  • ISA 2006 Branch office connectivity issue

    Hello,

    We have a branch office connecting to the central network via a Point to Point connection between 2 cisco routers. We receive packets from the branch network but there are no replies going back. Besides when we enable the branch network our central network goes down with an event which says there is a Proxy Chain Loop. Please refer to the diagram. The IP addressing on ISA 2006 is as below.

    External: 10.0.0.2 DG: 10.0.0.1
    Internal : 10.10.1.1 DG: No DG
    Branch : 10.0.1.2 DG: 10.0.1.1 (Perimeter)

    At one point we could receive packets from the branch network but the Central network did not respond back. Access rules are created for both ways. The traffic is being Routed between Internal and Perimeter and there is a NAT between Internal and External.

    Network Diagram

    http://www.freeimagehosting.net/uploads/e4e1f20ef0.jpg

    Please suggest.

    Thanks in advance!!

    Chandra
    Last edited by Chandra1412; 3rd September 2008, 08:59.

  • #2
    Re: ISA 2006 Branch office connectivity issue

    And whats in the Eventviewer?
    please review: http://forums.isaserver.org/m_206326...m.htm#20632611
    Marcel
    Technical Consultant
    Netherlands
    http://www.phetios.com
    http://blog.nessus.nl

    MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE
    "No matter how secure, there is always the human factor."

    "Enjoy life today, tomorrow may never come."
    "If you're going through hell, keep going. ~Winston Churchill"

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