[pptp-server] GRE traceroute for Win*?

[Neale Banks]

I have a need to check out the GRE path from a Win* client to a PoPToP
server :-(

I know about the GRE traceroute for unix, but the problem is from a Win*
client.  Any suggestions on how I can verify the end-end GRE path from a
Win* client to the PoPToP server?

FWIW, the "problem" is that the PoPToP server works just fine from an
MS-client on the same ISP as the PoPToP server but with an MS-client on a
different ISP all that appears in the pptp logs is "...pptpd[148]: MGR:
accept() failed".  No, the ISP where the PoPToP server is connected is not
filtering GRE.

Thanks,
Neale.