I have a user with a Win2K /Cisco IPsec with USB connection to a cable modem (in Australia). He has a routable IP address and supposedly no restrictions on VPN use from his ISP. The tunnel establishes...but then no packets are sent or received over the tunnel. Has anyone else seen problems with IPsec over USB? Any other thoughts? I have hundreds of successful VPN users client-concentrator. But nearly all are using ethernet to DSL or Cable modem. Thanks - I'm stuck! :-)
You should have a look at the MTU-Size. The Tunnel is established but no data can pass the tunnel. Try to use the SetMTU-Tool which come with your Client-Installation. For PPPoE connection try to set MTU-Size to 1390 Bytes. One of our Clients has had nearly the same problem and this solution fixed it.
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...