Use ethereal to look at the packets. Indeed, use ethereal to see if the
ping is actually leaving the SuSE box; perhaps it has a freak
misconfiguration you've overlooked?
BTW, don't forget that ethereal snoops ports, so if you see something
come into your machine you're seeing it before the firewall gets at it.
So if you see a ping response in ethereal but you don't see it, then
the firewall probably killed it.
HTH
Cheers,
Simon
--- David McMillan
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?
-- Check the headers for your unsubscription address For additional commands send e-mail to suse-linux-e-help@suse.com Also check the archives at http://lists.suse.com Please read the FAQs: suse-linux-e-faq@suse.com
"You can tell whether a man is clever by his answers. You can tell whether a man is wise by his questions." Naguib Mahfouz __________________________________ Start your day with Yahoo! - Make it your home page! http://www.yahoo.com/r/hs