Users on remote network behind Cisco 2821 reporting dropped connections to mail server behind ASA. 20-seconds later, the connections get re-established. I run a constant "ping" to the remote LAN and do not see a drop over the tunnel.
As I understand what I've read - esmtp inspect is on by default on the ASA. Is that true? So - in this case - would I turn it on in the router as well? BTW: These two sites are on a LAN2LAN VPN .... does that change what you suggested?
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...