OSEC

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From: Los, Ralph (rlosEnvestNet.com)
Date: Mon Sep 24 2001 - 11:14:07 CDT

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    Hello all,

            I have a very straighforward question.

    I have an IIS box that I need to proxy INTO from the web, for
    this I am using an ISA Server. I have the config drawn below
    currently in the architecture->build process and need input
    on whether the ISA Server will be adaptive towards my needs.

    Proxy/ISA box
      [||]
     Switch
      [||]
       |-Web Server/IIS5 (10.10.11.2)----ColdFusion Server (10.10.10.2)
       |-Web Server/IIS5 (10.10.11.3)----ColdFusion Server (10.10.10.3)
       |-Web Server/IIS5 (10.10.11.4)----ColdFusion Server (10.10.10.4)

    As you can see, the Proxy is hiding more than a single IIS
    box behind it. Each time a user logs into our site,
    ColdFusion keeps a "session variable" on the CF Server (not
    client!), therefore, forcing me to make sure my clients can
    "keep state" with the IIS box of original login.

    Also, I am doing port multiplexing versus having multiple
    IP's per box...meaning, each box has a single IP, running a web
    site on say, port 12000 (HHTP) and 22000 (HTTPS) and another
    site on 12001 (HTTP) and 22001 (HTTPS) and so on.

            [I hope I didn't leave anyone confused].

    The big question - CAN ISA handle this config, and HOW?

    Ralph M. Los
    Asst. Vice-President, Internet Systems and Security
    EnvestnetPMC
    rlosenvestnet.com
    (312) 827-3945 (direct)
    (312) 296-9003 (wireless w/voicemail)
    * If you haven't been hacked, you don't know where your vulnerabilities lie*