I have multiple clients using the Cisco VPN client to connect to a PIX 515. Everything was working fine until one of the ISP's that a couple clients use made a change that will not let them connect anymore. They claim to only be blocking UDP & TCP ports 135 - 139. I'm looking for documentation to prove to them that they are blocking something else. Can anyone point me to the documentation regarding the ports the VPN client uses to connect with regards to TCP & UDP.
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...
[toc:faq]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 and UDP are I...