I am running a Cisco 3015 VPN concentrator (4.0.3) and connecting with 4.0.3A VPN clients. Everything is working perfectly with Win2K, WinNT and 98 clients. Even some WinXP Home clients are okay.
However there are a few XP Home clients in addition to a couple of WinME clients that will connect to the concentrator, are pingable from the internal network but they can't ping anything back.
VPN using a dial-up ISP works fine. Only when using a radio or DSL high speed connection does the systems occur. The other odd thing is that there are many people using the VPN right next to the ME or XP Home workstations that can't ping. They are using the same network, have the same VPN client config, use the same high speed dial-up but there OSes are different (mostly 2K Pro). I have tried so many things (virus scans, route tables, make sure XP has the firewall option disabled, etc) but no luck. We are running tunnel everything and have replace the default IPSEC over TCP with a higher port number. If you look at a similar lab setup the encrypts are increasing on the VPN client and the RX on the concentrator is increasing respectivily.
Help! Anyone have any ideas? It appears to be a XP Home/ME based routing issue.
