Strange: can't ping vpn IP outside my ISP

[dweis]

W2k server - dedicated VPN
Test machine WinXP pro
VPN setup according to wizard and Microsoft docs
2 network cards, 1 attached to local network, 1 attached to hub that is directly attached to WAN rounter. I changed the default Routing and remote access Input/Output filters temporarily to allow any in both directions. The default gateway of my VPN machine is my WAN router.
WAN router is strictly pass through - all ports are open. There is a firewall for my network, but the VPN circumvents this by having the WAN network card connected outside the firewall and the LAN network card connected inside the firewall.

VPN WAN IP is Public, issued by by ISP (68.143.0.0 network)
Test maching is also outside my firewall on another WAN IP issued by my ISP (68.143.0.0 network) So same subnet mask.

I can ping the VPN server from my test machine which routes from the machine, to the WAN router to the VPN Server, but I can't ping it from my house (a different ISP) and neither can a friend that works at MS (yet another ISP). Any ideas? Thanks.

 

[dweis]

Anyone?

 

[ChicagoTechNet]

at home pc, try tracert command to check where is going to?

Robert Lin, MS-MVP, MCSE & CNE
Windows, Network, Internet, VPN, Routing and How to at

http://www.ms-mvps.com

 

[dweis]

Resolved the problem - IP conflict - thanks for the assistance.

 

[ChicagoTechNet]

Thank you for the update and we need that.

Robert Lin, MS-MVP, MCSE & CNE
Windows, Network, Internet, VPN, Routing and How to at

http://www.ms-mvps.com

 

[2468it]

I know you took care of this, but i faced a similar situation once and found that the ISP was blocking the standard Ping port from incoming.

We could ping out of the system fine, but pinging in never worked. We thought it was our equipment and settings.

We found out that Sprint (the ISP in question) was not allowing inward ping at all.

Hope this helps anyone who has this problem without a simple IP conflict.