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Routing through ISA 2006 and Cisco router

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  • Routing through ISA 2006 and Cisco router

    Problem Overview
    Unable to gain access when putting ISA on a separate subnet and connecting through a cisco router.

    I don't believe the problem is with the firewall blocking internet access. I have been successful when taking the router out of the equation and placing the ISA server directly on the 200.1.1.0 subnet level.

    Current Configuration


    Windows Server 2003 with ISA 2006:
    • NIC1 connecting to external internet (DHCP Acquired)
    • NIC2 connecting to FastEthernet0/1 on cisco router (10.1.1.2 vlan100)
    • ISA Firewall policy open to all internal/local to external

    Cisco Router:
    • FastEthernet0/1: 10.1.1.1 (connected to switch vlan100)
    • FastEthernet0/0: 200.1.1.1 (connected to switch vlan200)

    Switch:
    • Vlan100
    • Vlan200

    DC1:
    • Active Directory
    • DNS

    NPS1:
    • NAP
    • DHCP

    Local DHCP PC:
    • NIC: DHCP assigned between 200.1.1.10 - 200.1.1.50
    • Domain: LAB.NET

    Connection Order

    External > ISA Firewall > Switch(Vlan100) > Router > Switch (Vlan200) > Local PC


    Can anyone help me in getting this setup to allow local PC's to gain access to the external network via the ISA Server?

  • #2
    Re: Routing through ISA 2006 and Cisco router

    It should be no problem at all...
    Have you configured a static route on the ISA server and how have you configured your clients?
    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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