NAT question

Posted on 2008-11-03
Last Modified: 2013-11-16
I have a temporary outlook server sitting on an inside network and I need to set up OWA . We have a public block of IP's and I assigned a public DNS name to one of them to access the server externally. I added a route on the outside router telling it to route any traffic destined for XXX.XXX.209.9 (address assigned to OWA) to XXX.XXX.209.57 (outside int of ASA). Now I need to figure out what to configure on the asa to say whenever traffic destined for XXX.XXX.XXX.9 hits the outside interface, translate it to and send it to the outlook server.  I know this is simple natting, but I can't figure out which type of rule to use.
Question by:downscm
    LVL 43

    Accepted Solution

    This should do it:

    access-list outside_access_in extended permit tcp any host eq 443

    static (inside,outside) netmask
    LVL 2

    Expert Comment

    static (inside,outside) netmask if nothing else is using this outside IP
    static (inside,outside) tcp 443 443 netmask

    The above will also only work if your Exchange server is servicing OWA using SSL, as it should.. some admins like to use 80 also in which case you would also add
    static (inside,outside) tcp 80 80 netmask
    access-list outside_access_in extended permit tcp any host eq 80

    This also assumes your access-list is named outside_access_in

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