I have just put the PIX 501 firewall on this is the first time i have played with one.
I set up PAT for one external address x.x.x.3, where firewalls external IP is x.x.x.2. This works fine browsing downloading ETC for all internal clients. But i have an Exchange server (5.5) so i want a static route in and out of the firewall for mail and eventually OWA. I can't get the ports open. From the outside i can't ping, telnet(on port 25) to the server, but it does resolve name to address and from the inside i can't ping anything but can resolve. I have tried a static mapping from the external Ip to the exchange server but this does not work. I have i opened a TAC case but all their tips have not help. Mail NDR's come back internally - host unknown and from the outside i can't make the connection.
A PIX will not allow anything in unless you specifically allow it to. To get SMTP type traffic in you should apply an access control list to the outside interface that allows SMTP traffic to the specific IP address that the inside exchange server is network address translated to.
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We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...