Mailinglist Archive: opensuse (3336 mails)

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Re: [SLE] SuSE/Linux Ping vs DOS Ping
  • From: James Knott <james.knott@xxxxxxxxxx>
  • Date: Thu, 01 Dec 2005 16:30:22 -0500
  • Message-id: <438F6B6E.9060702@xxxxxxxxxx>
David McMillan wrote:
> G'day, fellow SuSE users. I've got a puzzler concerning ping
> responses that I hope someone can enlighten me about.
> I have a piece of industrial equipment that uses a TCP/IP Ethernet
> interface that I'm trying to troubleshoot at work. Part of the
> manufacturer's troubleshooting checklist is to "connect an DOS/Windows
> computer and use the PING command from the command line." Not having a
> D/W computer handy, I plugged in my SuSE 9.1 Pro laptop, but couldn't
> get a response. Not even a "connection refused," just silence.
> After some fairly exhaustive troubleshooting, this is what we found:
> 1: A DOS ping command, from another computer, using the same IP and
> netmask, over the same cable, got an immediate response.
> 2: The SuSE machine could not get a ping response, but *did* see
> the various open and filtered ports on the inustrial box, on the correct
> IP, when using nmap.
> 3: De/Re-activating SuSE Firewall made no difference.
> 4: The SuSE machine's ping command worked perfectly on a regular
> network, pinging Windows & *nix computers and various hardware routers
> without any difficulty.
> All I can think of is that there must be some minor difference
> between SuSE pings (or perhaps Linux pings in general) and DOS/Win pings
> that doesn't matter to most networks, but *does* matter for some reason
> to this piece of industrial hardware.
> Thoughts?

There is no difference. Ping is ping. It's a standard ICMP message,
which originated in the Unix world. It sounds like perhaps your
interface isn't configured properly.

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