LAN stopped working - 2 Win XP SP2 computers won't talk

[Guest]

Until about a month ago, I had a two computer network working very happily
over a small hub, and the two computers were able to communicate with no
problems. File sharing etc. was all working correctly. One machine is a
Dell Desktop the other is a Toshiba Laptop.

About a month ago, and we don't know exactly what happened, the two
computers stopped seeing each other. I think it was the Toshiba that had the
problem, and now if we try to access the other computer, XP tells us that we
don't have the necessary authority to see the other machine.

I have reviewed quite a lot of the correspondence on this newsgroup, and
have already tried to reset the network configurations myself, but to no
avail.

Currently, the laptop has an auto configured IP address of 169.354.127.237
and the other machine has an auto configured IP address of 169.254.4.219.
They are both on the same named network, but the laptop says it is a
peer-peer node, and the other machine says hybrid. Dhcp is enabled on both,
autoconfig is enabled on both but the laptop shows some oddities in the
Ethernet configuration settings.

On the laptop, the IP address field via iconfig shows as
fe80::200:39ff:fed6:7d9a%4, and on the other machine the IP address shows
194.154.147.65. Other items such as default gateway and DNS servers also
show what appear to be valid numbers but on the laptop, all I see is
fec0:0:0:ffff::1%1, 2%1, 3%1 etc. There is also something called Tunnel
adapter Teredo Tunneling Pseudo-Interface which I have never heard of, and
don't like the sound of very much.

Any advice on how to fix my network would be gratefully received.

Many thanks.

 

[Guest]

An update from Ali.

I made a typo in the IP address for the laptop - it should have read
169.254.127.237.

 

[Chuck]

Until about a month ago, I had a two computer network working very happily
over a small hub, and the two computers were able to communicate with no
problems. File sharing etc. was all working correctly. One machine is a
Dell Desktop the other is a Toshiba Laptop.

About a month ago, and we don't know exactly what happened, the two
computers stopped seeing each other. I think it was the Toshiba that had the
problem, and now if we try to access the other computer, XP tells us that we
don't have the necessary authority to see the other machine.

I have reviewed quite a lot of the correspondence on this newsgroup, and
have already tried to reset the network configurations myself, but to no
avail.

Currently, the laptop has an auto configured IP address of 169.354.127.237
and the other machine has an auto configured IP address of 169.254.4.219.
They are both on the same named network, but the laptop says it is a
peer-peer node, and the other machine says hybrid. Dhcp is enabled on both,
autoconfig is enabled on both but the laptop shows some oddities in the
Ethernet configuration settings.

On the laptop, the IP address field via iconfig shows as
fe80::200:39ff:fed6:7d9a%4, and on the other machine the IP address shows
194.154.147.65. Other items such as default gateway and DNS servers also
show what appear to be valid numbers but on the laptop, all I see is
fec0:0:0:ffff::1%1, 2%1, 3%1 etc. There is also something called Tunnel
adapter Teredo Tunneling Pseudo-Interface which I have never heard of, and
don't like the sound of very much.

Any advice on how to fix my network would be gratefully received.

Many thanks.

Ali,

Your first problem is name resolution. The laptop, with node type "peer-peer",
needs to be corrected.
<http://nitecruzr.blogspot.com/2005/05/address-resolution-on-lan.html#Peer-Peer>

Next, IPV6 aka Teredo Tunneling needs to be removed, at least until you get
everything else working.
<http://nitecruzr.blogspot.com/2005/05/reading-ipconfig-and-diagnosing.html#IPV6>

Next, check for misconfigured / overlooked firewalls, and for registry setting
restrictanonymous, on each computer.
Misconfigured / overlooked firewalls:
<http://nitecruzr.blogspot.com/2005/05/your-personal-firewall-can-either-help.html>
Registry setting restrictanonymous:
<http://nitecruzr.blogspot.com/2005/07/restrictanonymous-and-your-server.html>

If no help yet, provide "browstat status" and "ipconfig /all" from each
computer. Read this article, and linked articles, and follow instructions
precisely:
<http://nitecruzr.blogspot.com/2005/05/troubleshooting-network-neighborhood.html#AskingForHelp>

Please let us know if any of these suggestions are of any help. What you learn
may help others in the future, and that's the purpose of these forums.

 

[Guest]

Many thanks - this was really helpful and my network has been restored to
full working order. The information on the 'nitecruzr' site was extremely
detailed and well organised, so I had no problems following it.

 

[Chuck]

Many thanks - this was really helpful and my network has been restored to
full working order. The information on the 'nitecruzr' site was extremely
detailed and well organised, so I had no problems following it.

Thanks for your feedback, Ali.

 

[Guest]

Chuck,

Many thanks. Your diagnosis and links to solutions was very helpful for me,
too.

 

[Chuck]

Chuck,

Many thanks. Your diagnosis and links to solutions was very helpful for me,
too.

Thanks for the feedback, it's always appreciated.