I use AnyConnect to connect both XP and Vista clients to our company VPN. XP clients have no problem, but some Vista clients encountering issues. When they try to connect first time they get an error message "The VPN client driver has encountered an error" right after this comes "Unable to establish VPN". If they try again they get connected without any problems. This happens only the first time they try to connect.
Is there anything I can do to fix this? Any help will be appreciated.
I've been struggling with this issue for a week, its just my Vista 32bit Business SP1 that couldnt connect. I "fixed" it but its something that you may have to do each time. Open the network connections and then the any connect client. Begin the SSL connection and as that is trying to establish, right click and click enable on the Anyconnect vpn driver. That seemed to fix it for me! Good luck and hopefully MSFT will release a fix of some sort for Vista on this issue.
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...