We also added an entry in the ACL to permit port 65284 to 210.XXX.XXX.XXX.
The pop3 and imap ports work fine, but if you telnet to the public IP on the port 65284, it wont go through.
We are doing this for security reasons I guess (to avoid publishing port 25 straight to the Internet). This server does not recieve incomming email so having the port like this does not make problems for mail, it is mostly for remote users sending mail through our server.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...