Hi, If any one can help me on this issue. I am running pix 6.3(3). And I have a Exchange server who has mapped 1:1 through the pix and rest of work stations through a globle NAT pool address. How can I prevent unauthorized mail server to send a mail on port 25 whit out effecting my Exchange server to send mail to the outside world. Tanks in advance
It is nothing to do with mail relay on my Exchange server. Because I have a suspicion that one/som work-stations from my internal net sending spam to the outside world (they are behind a nat pool address.
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...