hoowaycn

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  • in reply to: Tcpip routing forward question? #5639
    hoowaycn
    Participant

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

      in reply to: Tcpip routing forward question? #5637
      hoowaycn
      Participant

        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

        in reply to: Send out modified ip packets, but no reponse ( NAT ) #5630
        hoowaycn
        Participant

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

          in reply to: Send out modified ip packets, but no reponse ( NAT ) #5629
          hoowaycn
          Participant

            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.

            in reply to: Send out modified ip packets, but no reponse ( NAT ) #5628
            hoowaycn
            Participant

              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?

              in reply to: NAT question #5604
              hoowaycn
              Participant

                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

                in reply to: How to list all current logon NT Domain users? #5590
                hoowaycn
                Participant

                  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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