PPTP connection issues

Discussion in 'Microsoft Windows 2000 Networking' started by Alex Harrington, May 13, 2004.

  1. Hi

    I'm using Windows 2000 to connect over the internet to a PPTP server.

    I can connect fine (with MSCHAPv2 and 128bit encryption) and the
    packetcounters go up just fine.

    If I ping a host on the remote network (10.108.1.1), I see traffic going
    out, and comming back via the packet counters, however I never get replies
    to the "ping".

    Running a packet sniffer on the remote end of the connection gives the
    following:

    05:53:47.082375 10.108.22.2 > 10.108.1.1: icmp: echo request
    05:53:47.082410 10.108.1.1 > 10.108.22.2: icmp: echo reply
    05:53:48.231031 10.108.22.2 > 10.108.1.1: icmp: echo request
    05:53:48.231043 10.108.1.1 > 10.108.22.2: icmp: echo reply
    05:53:49.731065 10.108.22.2 > 10.108.1.1: icmp: echo request
    05:53:49.731076 10.108.1.1 > 10.108.22.2: icmp: echo reply
    05:53:51.231373 10.108.22.2 > 10.108.1.1: icmp: echo request
    05:53:51.231385 10.108.1.1 > 10.108.22.2: icmp: echo reply

    so it would appear that my packets are reaching the network at the remote
    end, and are being sent back through the PPTP connection to my PC.

    Question then is why is ping saying "Request timed out".

    The remote network is a class A (10.108.0.0/19 subnet 255.255.224.0) and the
    PPP link when its up has addresses in the range 10.108.22.1-254 (ie within
    the remote subnet). The remote PPTP server proxies ARP for VPN clients.

    I've attached a copy of the routing table on my PC when the connection is
    up.

    Z:\>route print
    ===========================================================================
    Interface List
    0x1 ........................... MS TCP Loopback interface
    0x1000003 ...00 e0 18 ea a0 1b ...... ASUSTeK/Broadcom 440x 10/100
    Integrated Co
    ntroller
    0x6000004 ...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 10.109.1.100 10.109.1.210 1
    10.0.0.0 255.0.0.0 10.108.22.2 10.108.22.2 1
    10.108.22.2 255.255.255.255 127.0.0.1 127.0.0.1 1
    10.109.0.0 255.255.224.0 10.109.1.210 10.109.1.210 1
    10.109.1.210 255.255.255.255 127.0.0.1 127.0.0.1 1
    10.255.255.255 255.255.255.255 10.108.22.2 10.108.22.2 1
    10.255.255.255 255.255.255.255 10.109.1.210 10.109.1.210 1
    127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
    217.155.238.235 255.255.255.255 10.109.1.100 10.109.1.210 1
    224.0.0.0 224.0.0.0 10.108.22.2 10.108.22.2 1
    224.0.0.0 224.0.0.0 10.109.1.210 10.109.1.210 1
    255.255.255.255 255.255.255.255 10.109.1.210 10.109.1.210 1
    Default Gateway: 10.109.1.100
    ===========================================================================
    Persistent Routes:
    None

    and also the IP config

    Z:\>ipconfig /all

    Windows 2000 IP Configuration

    Host Name . . . . . . . . . . . . : titanium
    Primary DNS Suffix . . . . . . . :
    Node Type . . . . . . . . . . . . : Broadcast
    IP Routing Enabled. . . . . . . . : No
    WINS Proxy Enabled. . . . . . . . : No

    Ethernet adapter Local Area Connection:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : ASUSTeK/Broadcom 440x 10/100
    Integra
    ted Controller
    Physical Address. . . . . . . . . : 00-E0-18-EA-A0-1B
    DHCP Enabled. . . . . . . . . . . : No
    IP Address. . . . . . . . . . . . : 10.109.1.210
    Subnet Mask . . . . . . . . . . . : 255.255.224.0
    Default Gateway . . . . . . . . . : 10.109.1.100
    DNS Servers . . . . . . . . . . . : 10.109.1.100

    PPP adapter lh:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : WAN (PPP/SLIP) Interface
    Physical Address. . . . . . . . . : 00-53-45-00-00-00
    DHCP Enabled. . . . . . . . . . . : No
    IP Address. . . . . . . . . . . . : 10.108.22.2
    Subnet Mask . . . . . . . . . . . : 255.255.255.255
    Default Gateway . . . . . . . . . :
    DNS Servers . . . . . . . . . . . : 10.108.1.56
    10.108.1.56

    My guess is that it is some kind of subnetting problem, but I've no idea
    what or how to fix it.

    Cheers

    Alex
     
    Alex Harrington, May 13, 2004
    #1
    1. Advertisements

  2. Verify your config with one of these first two articles. One is for
    "Site-to-Site VPN", the other is for "Remote Access VPN". Use the one that
    fits your situation.

    Virtual Private Networking with Windows 2000: Deploying Router-to-Router
    VPNs
    http://www.microsoft.com/windows2000/server/evaluation/features/deplyr2rvpn.asp

    Virtual Private Networking with Windows 2000: Deploying Remote Access VPNs
    http://www.microsoft.com/windows2000/techinfo/planning/incremental/vpndeploy.asp

    Here are some others that may be of interest....

    Virtual Private Networking with Windows Server 2003: Deploying Site-to-Site
    VPNs
    http://www.microsoft.com/technet/prodtechnol/windowsserver2003/technologies/networking/vpndpls2.mspx

    Microsoft Windows Server 2003 Remote Access/VPN Server Role
    http://www.microsoft.com/technet/pr...3/serverroles/remoteaccessserver/default.mspx

    Overview of Deploying Dial-up and VPN Remote Access Servers
    http://www.microsoft.com/resources/...2003/all/deployguide/en-us/dnsbf_vpn_mcnx.asp


    --

    Phillip Windell [MCP, MVP, CCNA]
    www.wandtv.com


    "Alex Harrington" <> wrote in message
    news:%...
    > Hi
    >
    > I'm using Windows 2000 to connect over the internet to a PPTP server.
    >
    > I can connect fine (with MSCHAPv2 and 128bit encryption) and the
    > packetcounters go up just fine.
    >
    > If I ping a host on the remote network (10.108.1.1), I see traffic going
    > out, and comming back via the packet counters, however I never get replies
    > to the "ping".
    >
    > Running a packet sniffer on the remote end of the connection gives the
    > following:
    >
    > 05:53:47.082375 10.108.22.2 > 10.108.1.1: icmp: echo request
    > 05:53:47.082410 10.108.1.1 > 10.108.22.2: icmp: echo reply
    > 05:53:48.231031 10.108.22.2 > 10.108.1.1: icmp: echo request
    > 05:53:48.231043 10.108.1.1 > 10.108.22.2: icmp: echo reply
    > 05:53:49.731065 10.108.22.2 > 10.108.1.1: icmp: echo request
    > 05:53:49.731076 10.108.1.1 > 10.108.22.2: icmp: echo reply
    > 05:53:51.231373 10.108.22.2 > 10.108.1.1: icmp: echo request
    > 05:53:51.231385 10.108.1.1 > 10.108.22.2: icmp: echo reply
    >
    > so it would appear that my packets are reaching the network at the remote
    > end, and are being sent back through the PPTP connection to my PC.
    >
    > Question then is why is ping saying "Request timed out".
    >
    > The remote network is a class A (10.108.0.0/19 subnet 255.255.224.0) and

    the
    > PPP link when its up has addresses in the range 10.108.22.1-254 (ie within
    > the remote subnet). The remote PPTP server proxies ARP for VPN clients.
    >
    > I've attached a copy of the routing table on my PC when the connection is
    > up.
    >
    > Z:\>route print
    >

    ===========================================================================
    > Interface List
    > 0x1 ........................... MS TCP Loopback interface
    > 0x1000003 ...00 e0 18 ea a0 1b ...... ASUSTeK/Broadcom 440x 10/100
    > Integrated Co
    > ntroller
    > 0x6000004 ...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 10.109.1.100 10.109.1.210

    1
    > 10.0.0.0 255.0.0.0 10.108.22.2 10.108.22.2

    1
    > 10.108.22.2 255.255.255.255 127.0.0.1 127.0.0.1

    1
    > 10.109.0.0 255.255.224.0 10.109.1.210 10.109.1.210

    1
    > 10.109.1.210 255.255.255.255 127.0.0.1 127.0.0.1

    1
    > 10.255.255.255 255.255.255.255 10.108.22.2 10.108.22.2

    1
    > 10.255.255.255 255.255.255.255 10.109.1.210 10.109.1.210

    1
    > 127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1

    1
    > 217.155.238.235 255.255.255.255 10.109.1.100 10.109.1.210

    1
    > 224.0.0.0 224.0.0.0 10.108.22.2 10.108.22.2

    1
    > 224.0.0.0 224.0.0.0 10.109.1.210 10.109.1.210

    1
    > 255.255.255.255 255.255.255.255 10.109.1.210 10.109.1.210

    1
    > Default Gateway: 10.109.1.100
    >

    ===========================================================================
    > Persistent Routes:
    > None
    >
    > and also the IP config
    >
    > Z:\>ipconfig /all
    >
    > Windows 2000 IP Configuration
    >
    > Host Name . . . . . . . . . . . . : titanium
    > Primary DNS Suffix . . . . . . . :
    > Node Type . . . . . . . . . . . . : Broadcast
    > IP Routing Enabled. . . . . . . . : No
    > WINS Proxy Enabled. . . . . . . . : No
    >
    > Ethernet adapter Local Area Connection:
    >
    > Connection-specific DNS Suffix . :
    > Description . . . . . . . . . . . : ASUSTeK/Broadcom 440x 10/100
    > Integra
    > ted Controller
    > Physical Address. . . . . . . . . : 00-E0-18-EA-A0-1B
    > DHCP Enabled. . . . . . . . . . . : No
    > IP Address. . . . . . . . . . . . : 10.109.1.210
    > Subnet Mask . . . . . . . . . . . : 255.255.224.0
    > Default Gateway . . . . . . . . . : 10.109.1.100
    > DNS Servers . . . . . . . . . . . : 10.109.1.100
    >
    > PPP adapter lh:
    >
    > Connection-specific DNS Suffix . :
    > Description . . . . . . . . . . . : WAN (PPP/SLIP) Interface
    > Physical Address. . . . . . . . . : 00-53-45-00-00-00
    > DHCP Enabled. . . . . . . . . . . : No
    > IP Address. . . . . . . . . . . . : 10.108.22.2
    > Subnet Mask . . . . . . . . . . . : 255.255.255.255
    > Default Gateway . . . . . . . . . :
    > DNS Servers . . . . . . . . . . . : 10.108.1.56
    > 10.108.1.56
    >
    > My guess is that it is some kind of subnetting problem, but I've no idea
    > what or how to fix it.
    >
    > Cheers
    >
    > Alex
    >
    >
     
    Phillip Windell, May 13, 2004
    #2
    1. Advertisements

Want to reply to this thread or ask your own question?

It takes just 2 minutes to sign up (and it's free!). Just click the sign up button to choose a username and then you can ask your own questions on the forum.
Similar Threads
  1. Anthony

    How do I setup a VPN (PPTP) connection to use braodband

    Anthony, Nov 13, 2003, in forum: Microsoft Windows 2000 Networking
    Replies:
    1
    Views:
    157
    Doug Sherman [MVP]
    Nov 14, 2003
  2. Manish

    Creating VPN connection (PPTP/L2TP) in WIN2k

    Manish, Nov 24, 2003, in forum: Microsoft Windows 2000 Networking
    Replies:
    0
    Views:
    178
    Manish
    Nov 24, 2003
  3. scott

    pptp server fails to answer after win98 connection

    scott, Feb 10, 2004, in forum: Microsoft Windows 2000 Networking
    Replies:
    2
    Views:
    161
    scott
    Feb 10, 2004
  4. scott

    pptp connection to network with same IP range ?

    scott, Feb 18, 2004, in forum: Microsoft Windows 2000 Networking
    Replies:
    5
    Views:
    888
    scott
    Feb 19, 2004
  5. assi

    Traffic Issues with PPTP

    assi, Jul 3, 2005, in forum: Microsoft Windows 2000 Networking
    Replies:
    0
    Views:
    182
Loading...

Share This Page