We have 4 Win2003 Terminal Servers that need cisco vpn client to connect to our tax lodging service. We have been stuck on ver 3.6.3 for several years now as none of the newer clients connect with the newer versions. I have just tried 4.8 and it solved the connection problem but it seems to have affected the overall file browsing/opening/saving performance. The issue occurs immediately after the software is installed and the server restarted, no just when the client is actively connected. The one server I did not do the upgrade on for fallback reasons did not have the performance issue. The issue was resolved by going back to the old version, this is not ideal as the old software while working fine, also causes a vsdatant.sys error for each user logging onto the server. Is there anything we can do to tune the new software so it does not affect local network performance.
Poor performance could be due to the fact that MSS (TCP Maximun Segment Size) not being negociated between the VPN client and the VPN gateway. What VPN gateway the clients are connecting to? I heard there are MSS issues with the VPN concentrators.
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...