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  • ICMP Ping time out

    I was hoping someone could assist.

    I have several servers in an environment, I'm basically having an issue pinging a netware device in a trusted domain, as simple as it sounds, sending an ICMP packet is sendt successfully but I receive no reply, yet I have no issues pinging the same netware device from al the other servers which are on the same subnet. I also don't have any isuses pinging form teh same server in question to another netware devbice which is in the same subnet as the one which I cannot ping.
    When a trace the route to the netware device it times out after hitting the default gateway. At first glance I would suspect it's network or firewall related based on IP, however, nothing was found, no traffic blocked. That's what I was told anyway.

    I'm basically trying to make sure that there is nothing preventing communication from this server to the netware device. And was hoping someone may know what else I could check. I have already confirmed that all O/S, Firmware and drivers are the same form a Windows perspective.

    What I haven't tried is changing the IP address to see if it's IP specific related, IP address based rule, NIC driver, IP sec etc.

    O/S: WINDOWS SERVER 2003 SP2 STD

    Any suggestions?

  • #2
    Re: ICMP Ping time out

    if everything in the same subnet?

    need a little more info..

    ipconfig from:

    1. the server you're trying to ping
    2. a server that can ping it successfully
    3. the server that can't.

    Also - how do you know the icmp packet is being sent successfully, if you're not getting a reply?
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    • #3
      Re: ICMP Ping time out

      Hi, Yes everything is in the same subnet mask.

      So for example.
      Source which I cannot ping FROM:
      IP Address: 137.172.147.47
      Subnet mask: 255.255.255.224
      Default Gateway: 137.172.147.36


      Source which I can ping from:
      IP Address: 137.172.147.50
      Subnet mask: 255.255.255.224
      Default Gateway: 137.172.147.36


      The ICMP packet as indicated by wireshark is sent, that's as far as I went. There are no packlets returned from destination.
      Trace route stops at the default gateway and then times out.

      From a network point of view I cannot see this as we don't manage that and was told that there is no traffic blocked.

      There are no local firewalls blocking, AV etc.

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      • #4
        Re: ICMP Ping time out

        what are you pinging TO ?
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        • #5
          Re: ICMP Ping time out

          I'm pinging to 10.124.22.40 for example, no reply, however, pinging to I'm pinging to 10.124.22.41 for example works form the server server.

          They are on a different network, with a fortigate firewall in the middle. All traffic permitted.

          When adding a secondary ip to 10.124.22.40, the ing was successfull.

          To me it sounds like a firewall blocking it, however, as I was told it was clear and traffic permitted but I still have my doubts.

          I"ve already compared network configurations on all servers on the same subnet, no local firewalls, disabled AV etc, still no ping to this one device.

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          • #6
            Re: ICMP Ping time out

            Canyou ping the gateway???

            If you can then your problem is firewall blocking.

            You'll probably find that the servers IP address is not in a list of allowed IP's

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