We have some issues with emails and the domain gets blacklisted. I am thinking if there is some kind of virus on some computers which may be using port 25 to send smtp traffic. I was wondering if there is any way to configure the PIX for it to accept smtp traffic only from the mail servers and block any kind of smtp traffic from individual PCs. This is all on the LAN. I thought of creating ACLs on inside interface but I may have to create multiple ACLs and hard to manage.
And is there any way on the PIX to see the host IP or MAC which may be sending lot of SMTP traffic?
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...