I am setting up an IPSec VPN over TCP 443 using a Cisco 3005 Concentrator. Now in my testing I am able to connect to the VPN when connected from the same subnet. However, when I try to connect from outside I get the following message:
334 01/17/2006 14:04:51.480 SEV=5 IP/49 RPT=32
Headend transmitting TCP SYN-ACK pkt to client XX.YY.ZZ.115, TCP dest port 2007
So I know that the traffic is at least getting to my Concentrator.
I know I am missing something, but I can't figure out what it is.
Hello. This is probably related to the fact that the concentrator is listening on port 443 for you to be able to manage the appliance. It's been a while since I last configured a 3k VPN Concentrator, but I do believe there's an option for you to disable HTTP and keep HTTPS when managing the 3005 using the GUI. Check if this is the case, and try establishing your sessions on port 80 instead. Hope this works!
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...