How are you trying to establish the VPN connection? Are you doing a LAN-to-LAN VPN? If so, you are definitely missing something.
If you are running some sort of VPN client software on the client machines, you may be having a problem with NAT-Traversal, or NAT-T. Your client must support IPSec over UDP. Microsoft's PPTP client, for example, doesn't support it by default, but an update is available from their website that supports this functionality.
Please provide a little more detail for a better answer.
the pc was preconfigured by the vendor whom we are trying to connect. They did all the configuration. It's a w2k machine using the ms vpn client. I am not doing site to site. There is one pc that needs access to a vpn server at another company. I just want to allow vpn traffic to and from. I have tried to find the update for the pptp client, but can not seem to find it on microsoft's site
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...