I knew that Cisco IPSEC IP port are IP protocol 50 (for ESP) and UDP/500 (for ISAKMP) and if doing NAT-T then it uses UDP/4500 and AH then it uses IP protocol 51.My big question is what is the port involved on Microsoft PPTP connection back to Cisco PIX VPN.
I test on my PIX using LAN simulation on VPN connection and it all work but during the real implementation where my client using dial-up connection were unable to connect it back and it just popup the message remote peer is not responding.Will it be my ISP side is blocking the ports and I'm sure my config is correct.
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...