I have pix 515e Version 6.3(5). After installing it, it worked well for like 2-3 hours and all of a sudden stopped working. There were no crashes as such.
The firewall had an external IP address of 22.214.171.124 with a default route pointed to 126.96.36.199 which is a 6500 core switch. I was not able to ping 188.8.131.52from the firewall. I tried connecting to different ports on the switch but no success and also connected the firewall to may laptop ( giving my laptop 184.108.40.206) and still no success.
One of the things i found is that when the firewall pings 220.127.116.11 , it sends icmp echos but doesnot receive anything back ( both in case of switch and laptop). I checked the configs and icmp has been allowed. I found that while on the ARP table of firewall i could see 18.104.22.168 but on ARP table of switch i couldn't see 22.214.171.124. I tried clearing arp entries but that did not help.
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...