RE: Cannot ping or be pinged no matter what...

I have gone thru that same thing in the past on the same network...it was the
cable...95% of the systems had no problem with it...the other 5% would not
work. I have also had ethernet cards that tested fine and did not work,
switching tham out was the fix.

"Brian Foster" wrote:

> I've been managing networks for over five years, but I've come across
> something that's got me baffled.
>
> I have a Windows XP machine (SP2) on a workgroup network of 4
> computers. This one computer cannot ping anything else (including the
> default gateway), and cannot be pinged from any other machine on the
> network. This causes problems for applications I run on the machine
> that rely on ICMP to test for the presence of particular machines. But
> the wierd thing is that except for pinging, XP's device manager
> reports the network card functioning correctly, the machine in
> question has full internet connectivity, and it can be found if you
> put its name or IP address directly into a run box e.g.
> \\192.168.1.101\c$
>
> Some more info:
>
> On the machine in question Ping itself works, because the machine can
> ping 127.0.0.1 and it's own IP address but cannot see the gateway
> 192.168.1.1 to which it is connected by Ethernet (a Linksys WRT54g).
>
> I've confirmed it's not the cabling or the router setup, because
> connecting another machine to the same ethernet cable and hub port
> works, and when I do that, the new machine connected by the same cable
> can indeed ping the router and other machines.
>
> All wireless machines on the network can also ping the router via
> Wireless. So it's just this one computer that's driving me nuts.
>
> Here's what I've tried:
>
> * Releasing and getting a new IP address from the router (a DHCP
> server). No effect.
> * Forcing a manual IP address. No effect.
> * Changing the ethernet cable. No effect.
> * Changing the network card, to one that's been known to work on the
> same network. No effect.
> * Reinstalling the network card drivers.
> * Opening firstly the ICMP and then all ports on the machine's SP2
> firewall, and then even including disabling the entire firewall. No
> effect.
> * Running a netsh int reset to reset the protocol. No effect.
> * Turning off the router's firewall. No effect.
>
> Any ideas? Am I looking at reinstalling the TCPIP files off the SP2
> CD? Or a full reinstall? Suggestions welcomed!
>
.

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