I'm having a strange issue when uploading very specific files (ONLY .CSV) through my PIX firewall. For whatever reason, only this file format fails when users upload to any FTP site, and it always fails after about 65000(+/-) bytes. Renaming the file doesn't matter so it has something to do with the actual format and not the mime extension.
I've got a PIX520 running version 6.3(4) and my edge router is a 2600 running 12.3.14(T4). If I FTP Internally accross my WAN, the problem doesn't occur, only when traversing my PIX and edge router out to the Internet.
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...