Dear everybody,

I have the following problem and I strongly hope someone may help me.

The network topology
====================
- Server. Windows 2000 Advanced Server running a VPN server. The private IP
address is 10.0.0.2 and the public IP address is 81.x.x.x

- Computer A. Windows NT 4.0 client PC running a PPTP VPN client. After the
VPN (dial up) connection is up, the PC ha assigned the private
IP address 10.0.0.3. Its public IP address is 83.x.x.x. The PC
has also a local NIC with IP address 192.168.10.30. The flag "IP
forwarding" in the Control Panel -> Network -> Protocols ->
TCP/IP -> Routing page is checked

- Computer B. Windows 2000 Pro PC having only one NIC with IP address
192.168.10.2. The routing table contains an entry for the
10.x.x.x network

The goal
========
I have to ping the from the using the built-in routing
feature of .

The problem
===========
Pinging from the private IP address of the (10.0.0.2)
I don't receive any replies. Pinging the private IP address of
(10.0.0.3) from I get the replies to my pings. It seems the IP
routing on does not work properly. But I have checked the "IP
forwarding flag" !!! The routing table of contains the following
entries:

================================================== =========================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...00 e0 c7 07 3a 6c ...... NDIS 4.0 driver
0x3 ...00 00 00 00 00 00 ...... NdisWan Adapter
0x4 ...00 02 50 8f d2 fc ...... NdisWan Adapter

0x5 ...00 01 10 6d d2 fc ...... NdisWan Adapter

================================================== =========================
================================================== =========================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 10.0.0.3 10.0.0.3 1
0.0.0.0 0.0.0.0 83.224.80.216 83.224.80.216 2
10.0.0.0 255.0.0.0 10.0.0.3 10.0.0.3 1
10.0.0.3 255.255.255.255 127.0.0.1 127.0.0.1 1
81.208.105.39 255.255.255.255 83.224.80.216 83.224.80.216 1
83.0.0.0 255.0.0.0 83.224.80.216 83.224.80.216 2
83.224.80.216 255.255.255.255 127.0.0.1 127.0.0.1 1
83.255.255.255 255.255.255.255 83.224.80.216 83.224.80.216 1
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
192.168.10.0 255.255.255.0 192.168.10.30 192.168.10.30 2
192.168.10.30 255.255.255.255 127.0.0.1 127.0.0.1 1
192.168.10.255 255.255.255.255 192.168.10.30 192.168.10.30 1
224.0.0.0 224.0.0.0 10.0.0.3 10.0.0.3 1
224.0.0.0 224.0.0.0 83.224.80.216 83.224.80.216 1
224.0.0.0 224.0.0.0 192.168.10.30 192.168.10.30 1
255.255.255.255 255.255.255.255 192.168.10.30 192.168.10.30 1
================================================== =========================

Please, address me to the solution ...

Best Regards

/Alessandro