how win2k client connect with pptpd server on linux

[linuxbug]

I have a ADSL with my win2k and now I can visit Internet with ADSL.
Then I create a VPN connection from the win2k to a linux pptp server.
I noticed that this connection was successed! But I can't ping linux pptp server via tunnel-ip?

Windows 2000 IP Configuration

Ethernet adapter 2:

Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : *.*.205.159
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : *.139.*.159

Ethernet adapter :

Connection-specific DNS Suffix . :
Autoconfiguration IP Address. . . : 169.254.1.186
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :

PPP adapter virtual private connection:

Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 192.168.102.231
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . :


the linux server's ip configure :
eth0 Link encap:Ethernet HWaddr 00:40:05:15:19:FE
inet addr:*.*.*.* Bcast:*.*.*.* Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:179 errors:0 dropped:0 overruns:0 frame:0
TX packets:205 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:18267 (17.8 Kb) TX bytes:27530 (26.8 Kb)
Interrupt:11 Base address:0xdc00

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:87 errors:0 dropped:0 overruns:0 frame:0
TX packets:87 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:9576 (9.3 Kb) TX bytes:9576 (9.3 Kb)

ppp0 Link encap:Point-to-Point Protocol
inet addr:192.168.102.250 P-t-P:192.168.102.231 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:229 errors:0 dropped:0 overruns:0 frame:0
TX packets:2663 errors:0 dropped:0 overruns:0 carrier:0