IP forwarding and VPN - Windows NT

This is a discussion on IP forwarding and VPN - Windows NT ; Dear everybody, I'm wondering with a problem regarding IP forwarding and VPN. I have configured a Windows NT 4.0 PC as a VPN client. The PC makes a dial-up call to the VPN server and it gets a connection. The ...

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Thread: IP forwarding and VPN

  1. IP forwarding and VPN

    Dear everybody,

    I'm wondering with a problem regarding IP forwarding and VPN.

    I have configured a Windows NT 4.0 PC as a VPN client. The PC makes a
    dial-up
    call to the VPN server and it gets a connection. The devices involving
    in the
    connection (the modem and the RASPPTPM virtual device) are configured
    as dial
    out only. IP forwarding flag is enabled. The PC has also an Ethernet
    NIC at
    address 192.168.10.30.
    When the PC gets access to the VPN server it was assigned at IP
    address
    10.0.0.3. The VPN server has the private IP address 10.0.0.2. I'm able
    to ping
    the VPN server.

    Connected to the Ethernet interface of the PC (192.168.10.30) I have
    another
    PC with IP address 192.168.10.1. I have added in its routing table the
    path to
    reach the subnet 10.0.0.0. (Dst=10.0.0.0 Msk=255.0.0.0
    Gw=192.168.10.30)
    I wish to ping the VPN server (10.0.0.2) from this PC using the
    built-in routing feature of the VPN client (10.0.0.3).

    The ping doesn't work. I have reproduced the same situation using a
    Windows
    2000 Professional PC as VPN client instead of the Windows NT one. The
    ping
    works !!!

    Could you suggest me anything ?

    Best Regards

    /Alessandro

  2. Re: IP forwarding and VPN

    Uzytkownik "Alessandro Strazzero" napisal
    w wiadomosci news:391fed46.0412091033.602caa5a@posting.google.c om...
    > Dear everybody,
    >
    > I'm wondering with a problem regarding IP forwarding and VPN.
    >
    > I have configured a Windows NT 4.0 PC as a VPN client. The PC makes a
    > dial-up
    > call to the VPN server and it gets a connection. The devices involving
    > in the
    > connection (the modem and the RASPPTPM virtual device) are configured
    > as dial
    > out only. IP forwarding flag is enabled. The PC has also an Ethernet
    > NIC at
    > address 192.168.10.30.
    > When the PC gets access to the VPN server it was assigned at IP
    > address
    > 10.0.0.3. The VPN server has the private IP address 10.0.0.2. I'm able
    > to ping
    > the VPN server.
    >
    > Connected to the Ethernet interface of the PC (192.168.10.30) I have
    > another
    > PC with IP address 192.168.10.1. I have added in its routing table the
    > path to
    > reach the subnet 10.0.0.0. (Dst=10.0.0.0 Msk=255.0.0.0
    > Gw=192.168.10.30)
    > I wish to ping the VPN server (10.0.0.2) from this PC using the
    > built-in routing feature of the VPN client (10.0.0.3).


    the VPN server (10.0.0.2) has to know the route to the 192.168.10 network -
    i.e. "route add 192.168.10.0 mask 255.255.255.0 10.0.0.3",
    and of course "route add 10.0.0.0 mask 255.255.255.0 192.168.10.30".
    255.255.255.0 mask just for future, so that You could connect additional
    computers on both sides
    Please, let us know if this halped You

    Tomek



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