I've installed a pix 515 firewall.Its working fine and sometimes it hangs. I heard that the batches built between may 2001 and oct 2001 were suspect and cisco issuing a recall. I suspect there may a hardware problem also.
That is correct. The bug I suppose you are looking for is CSCds19881.
Please read the field notice for this problem since it gives you the information needed to verify if your PIX was affected by this bug, if not, I seriously recommend that you contact the TAC to quickly isolate and solve the problem.
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...