We are experiencing problems with a PIX 515e firewall V7 software. The PIX sits at our central site and handles s2s VPN's.
When a remote VPN user to send information through the PIX to a central server we receive a sporadic error:
No route to (External IP of Remote Dialer) from (External IP of PIX)
This is only a real problem when the user is sending a large email. When this error appears the SMTP connection terminates and doesn't attempt to reconnect. The PIX has an outside default route to a Cisco router on a fixed line.
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...