Can't ping loopback

[jon]

I inherited a small peer-to-peer nextwork of XP computers.
They ALL can surf the web. Some are viewable via net
view, but not all. I have checked the basics: NIC config,
routing, IP address conflicts, etc. All look good and/or
identical between working and non-working machines.

The machines that cannot be seen also cannot ping
loopback or their own IP address. (But can surf the WEB!)
These same computers can ping some other computers (and
the gateway) on the same subnet. I read that if the
loopback ping does not work, either NIC is bad or TCP/IP
stack is corrupt. Swapped NIC's between computers, no
help. Ran netsh int ip reset to "uninstall/reinstall" the
IP protocol. No difference.

HELP!

Degree of difficulty: 8 out of 10 (I think)

Thanks!

Jon

[Steve Winograd [MVP]]

In article >, "jon"
> wrote:
>I inherited a small peer-to-peer nextwork of XP computers.
>They ALL can surf the web. Some are viewable via net
>view, but not all. I have checked the basics: NIC config,
>routing, IP address conflicts, etc. All look good and/or
>identical between working and non-working machines.
>
>The machines that cannot be seen also cannot ping
>loopback or their own IP address. (But can surf the WEB!)
>These same computers can ping some other computers (and
>the gateway) on the same subnet. I read that if the
>loopback ping does not work, either NIC is bad or TCP/IP
>stack is corrupt. Swapped NIC's between computers, no
>help. Ran netsh int ip reset to "uninstall/reinstall" the
>IP protocol. No difference.
>
>HELP!
>
>Degree of difficulty: 8 out of 10 (I think)
>
>Thanks!
>
>Jon

The problem is almost certainly caused by a firewall program that's
improperly configured or incompletely un-installed.
--
Best Wishes,
Steve Winograd, MS-MVP (Windows Networking)

Please post any reply as a follow-up message in the news group
for everyone to see. I'm sorry, but I don't answer questions
addressed directly to me in E-mail or news groups.

Microsoft Most Valuable Professional Program
http://mvp.support.microsoft.com

[Jon Szejda]

Thanks for your reply, Steve! The XP firewall is not
installed on these computers. The firewall you speak of
must be installed on each computer individually, Eh?

I will check for other vendor firewall installs...Any
other ideas?

Thanks again!

Jon


>-----Original Message-----
>In article >, "jon"
> wrote:
>>I inherited a small peer-to-peer nextwork of XP
computers.
>>They ALL can surf the web. Some are viewable via net
>>view, but not all. I have checked the basics: NIC
config,
>>routing, IP address conflicts, etc. All look good and/or
>>identical between working and non-working machines.
>>
>>The machines that cannot be seen also cannot ping
>>loopback or their own IP address. (But can surf the
WEB!)
>>These same computers can ping some other computers (and
>>the gateway) on the same subnet. I read that if the
>>loopback ping does not work, either NIC is bad or TCP/IP
>>stack is corrupt. Swapped NIC's between computers, no
>>help. Ran netsh int ip reset to "uninstall/reinstall"
the
>>IP protocol. No difference.
>>
>>HELP!
>>
>>Degree of difficulty: 8 out of 10 (I think)
>>
>>Thanks!
>>
>>Jon
>
>The problem is almost certainly caused by a firewall
program that's
>improperly configured or incompletely un-installed.
>--
>Best Wishes,
>Steve Winograd, MS-MVP (Windows Networking)
>
>Please post any reply as a follow-up message in the news
group
>for everyone to see. I'm sorry, but I don't answer
questions
>addressed directly to me in E-mail or news groups.
>
>Microsoft Most Valuable Professional Program
>http://mvp.support.microsoft.com
>.
>