[fw-wiz] re: pix firewall config quest

From: Mike Hoskins (mike_at_adept.org)
Date: 08/14/03

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    To: firewall-wizards@honor.icsalabs.com
    Date: Wed, 13 Aug 2003 18:20:59 -0700 (PDT)
    
    

    From: "Don Burgess" <don_burgess@hotmail.com>
    Date: Thu, 07 Aug 2003 00:44:20 -0700
    > sorry for this being such a basic question, but i am using a PIX to
    > learn, and i am trying to fingure out how to forward a port from the
    > incoming interface to a internal ip..

    i think you'd do that with a static and an ACL entry...

    > here is the basic scenario
    > pix 506e
    > internal pat 192.168.1.0
    > external interface address in my test setup is 10.10.1.208
    > internal ip that i want to access the port of 192.168.1.10
    > port that i want to access 3000

    there may be a better way, but (long lines wrapped at backslash)...

    ! just an alias
    name outsidehost 10.10.1.208
    ! you may want to adjust the embryonic limit (32 here)
    static (inside,outside) outsidehost 192.168.1.10 \
            netmask 255.255.255.255 0 32

    then in the ACL applied to your external interface (remember, packets from
    an interface with a lower security level -- e.g. outside -- are not
    allowed to pass to an interface with a higher security level -- e.g.
    inside - by default.) you would add a rule allowing the desired traffic,

    access-list 100 permit tcp any host outsidehost eq 3000

    this assumes you're using ACL # 100 to control traffic flow from your
    outside interface to your inside interface. as such, you should also have
    an appropriate 'access group' defined,

    access-group 100 in interface outside

    -mrh

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