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[hoowaycn]

Thanks, the problem solved. I have enable XP “firewall” before.

[hoowaycn]

Oh, understand, thanks.

Followed your suggestion.

I do this, print all caught packet, NOT do any address subsititute action
Just want to know I can catch that packet at external interface.

/// set flag MSTCP_FLAG_SENT_TUNNEL|MSTCP_FLAG_RECV_TUNNEL

if (PacketBuffer.m_dwDeviceFlags == PACKET_FLAG_ON_SEND)
{
/// tcpstack –> interface

print(“tcpstack — > interface: %s”, interfaceName );
for(i=0;i print(“%x: rn” , PacketBuffer.m_IBuffer);
}

if (PacketBuffer.m_dwDeviceFlags == PACKET_FLAG_ON_RECV)
{
/// interface — > tcpstack

print(“interface —> tcpstack: %s”, interfaceName );
for(i=0;i print(“%x: rn” , PacketBuffer.m_IBuffer);
}

I do a “ping 218.30.103.40” at the client computer, as the the correct result I should catch the packet at “TcpStack –> Interface: External”, but failed.
I only get it at “Interface –> Stack: Internal”. As you have told before, I
should get the packet at “TcpStack –> Interface: External”. Can you tell me where the error from?

My environment is like below

internet —- adsl modem — HUB

---

inner client( 192.168.1.3)
|
NAT computer (192.168.1.2 WinXP)

NAT computer use RasPPPoE to connect ADSL.

Below is my route table

=====================================
Interface List
0x1 ……………………… MS TCP Loopback interface
0x2 …00 50 ba 63 2b bd …… VIA Compatable Fast Ethernet Adapter
0x40004 …00 53 45 00 00 00 …… WAN (PPP/SLIP) Interface
=====================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 61.50.227.147 61.50.227.147 1
61.50.227.147 255.255.255.255 127.0.0.1 127.0.0.1 50
61.149.96.1 255.255.255.255 61.50.227.147 61.50.227.147 1
61.255.255.255 255.255.255.255 61.50.227.147 61.50.227.147 50
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
192.168.1.0 255.255.255.0 192.168.1.2 192.168.1.2 20
192.168.1.2 255.255.255.255 127.0.0.1 127.0.0.1 20
192.168.1.255 255.255.255.255 192.168.1.2 192.168.1.2 20
224.0.0.0 240.0.0.0 192.168.1.2 192.168.1.2 20
224.0.0.0 240.0.0.0 61.50.227.147 61.50.227.147 1
255.255.255.255 255.255.255.255 192.168.1.2 192.168.1.2 1
Default Gateway: 61.50.227.147
============================
Persistent Routes:
None

Here is one packet I caught

interface–>tcpstack Local Connection (Internel)
0: 50: ba: 63: 2b: bd: 0: 10: dc: 1: b8: 9f: 8: 0: 45: 0:
0: 3c: 38: cf: 0: 0: 80: 1: fe: ff: c0: a8: 1: 3: da: 1e:
67: 28: 8: 0: 29: 5c: 2: 0: 22: 0: 61: 62: 63: 64: 65: 66:
67: 68: 69: 6a: 6b: 6c: 6d: 6e: 6f: 70: 71: 72: 73: 74: 75: 76:
77: 61: 62: 63: 64: 65: 66: 67: 68: 69:

This is a ICMP Echo Req packet

[hoowaycn]

Can anyone help me to solve this problem?If I solve this problem in my evaluation, I would purchase one.

[hoowaycn]

I run a sniffer to monitor the packets
and find that MSTCP doest not send out my nat packets.
What’s reason cause it to drop the packets?

Can someone send a NAT sample, so I can whether it computer
configuration problem or my nat problem.

[hoowaycn]

It’s XP. For the PPP, I use RasPPPoE.

Enable IP routing? Do you mean set
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesTcpipParameters
IPEnableRouter to 1.

Oh, I did it.

And test again, still no response!!

Do you need to see the whole code?

[hoowaycn]

You can use any free port number (an example just take some rarely used port range like 10000-64000 and allocate ports from there).

So what about if some application use this port number at the NAT computer? Is there any conflicts if use same port number ( with some application at NAT computer )?

Another question: how to get binding IP address for each interface adapter, and how to get windows route table?

Thanks a lot

[hoowaycn]

I did a test, logon , then logoff, then logon again, but in the server ( domain controller), the return result doesn’t show what I did.

How do you get which user has logged on?

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