Is it possible to allow traffic to come into the WAN port from an unencrypted source (such as SMTP or RDP to our server from the Internet), as well as from an encrypted source (SMTP/RDP from a client on the remote side of a LAN-to-LAN VPN).
Our router is allowing SMTP from the Internet. VPN tunnel is up and passing all traffic except where we have NAT statements that redirect traffic from the Internet to the SMTP 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...