this may help. quoted from
http://www.ChicagoTech.net
Can't ping VPN client by name
Symptom: you can ping the vpn client by ip but when attempting to ping a vpn
client from remote LAN, you get time out.
Resolution: 1) if you have correct DNS and WINS settings, you should be
able to ping vpn client by name.
2) If you get the time out with a different ip (for example, ping ip is
192.168.100.7 and real ip is 192.168.100.13), check the dns and wins records
and delete the 192.168.100.7.
3) If the dns and wins records don't show the client record, make sure it
points to the same and correct dns and wins.
4) If the VPN client doesn't register its DNS, you may need to go the VPN
connection properties>networking>TCP/IP. On the DNS tab, enter the DNS
server IP in DNS suffix for this connection and check Register this
connection's addresses in DNS. Or use ipconfig /registerdns command.
5) Also make sure all computers are pointing to the same DNS.
--
For more and other information, go to
http://www.ChicagoTech.net
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Robert Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN, Anti-Virus, Tips & Troubleshooting on
http://www.ChicagoTech.net
This posting is provided "AS IS" with no warranties.