I've got email logging for a few specific syslog messages working and sending to an email server on the inside network. However, the source IP ends up being the DMZ interface. Is there a way to force it to use the inside IP instead?
The ASA will automatically select the source interface based on the routing table, which is not a configurable option. This is by design as the ASA will only allow communication to an interface from hosts behind that same interface. In other words, the server won't be able to reach the inside interface if it is behind the DMZ interface.
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...