Thanks for your response, We have a cust we support only their router, we block Private address space on the router. The cust is using PIX firewall ,
explained to him that he need to NAT , his internal network is private address. so not to sure what the configs on the Pix are.As far as the rotuer is concerned we are not specifiaclly blocking any ports or any Ip address.
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...