I have a problem with a PIX 501 that allows you to establish a VPN session to a remote network (using the Cisco VPN client software) but does not permit you to ping any devices on the remote network. This problem only occurs with the PIX. I have similar environments not running PIX firewalls that do not have this problem. If I replace the PIX with a non Cisco firewall, the problem goes away or if I create a site-to-site tunnel, I can then access the remote network.
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...