Cannot browse LAN, but still surfing the net

  • Thread starter Thread starter Plastic Man
  • Start date Start date
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Plastic Man

Hi folks, funny story.

We disconnected one of the reliable work-horses (our antivirus server)
from the LAN to use the ethernet connection on the wall temporarily for
the boss's laptop upgrade. We've done this many many times before
without issue. This time, upon reconnecting the ethernet cable, there
is no access to the LAN by the antivirus machine.

It doesn't matter what plug on the wall we use or what log-in name we
use (yes, the permissions are all high enough). We've reinstalled the
networking components countless times. No luck.

Oddly though, we can ping all other network computers, refresh the IP
from the DHCP server, surf the web, and receive email.

So far, there's some registry tweaks about NODE TYPES and such that are
discussed on Google. But nothing describes the sudden loss of a
previously robust connection.

Perhaps this tidbit is irrelevant, but we have added two new users to
our domain in recent days. I am 99% sure we have CAL's for several more
clients. And surely upon log-in we'd be informed if we were refused
authentication to the domain?

Any ideas?

Plastic Man
 
Hi folks, funny story.

We disconnected one of the reliable work-horses (our antivirus server)
from the LAN to use the ethernet connection on the wall temporarily for
the boss's laptop upgrade. We've done this many many times before
without issue. This time, upon reconnecting the ethernet cable, there
is no access to the LAN by the antivirus machine.

It doesn't matter what plug on the wall we use or what log-in name we
use (yes, the permissions are all high enough). We've reinstalled the
networking components countless times. No luck.

Oddly though, we can ping all other network computers, refresh the IP
from the DHCP server, surf the web, and receive email.

So far, there's some registry tweaks about NODE TYPES and such that are
discussed on Google. But nothing describes the sudden loss of a
previously robust connection.

Perhaps this tidbit is irrelevant, but we have added two new users to
our domain in recent days. I am 99% sure we have CAL's for several more
clients. And surely upon log-in we'd be informed if we were refused
authentication to the domain?

Any ideas?

Plastic Man
Click to expand...

you do have netbios installed right?
 
you do have netbios installed right?


What do you take me for, an idiot? You no good, yellow-bellied....

Uh wait, let me check first :-) Though the machine I'm using now is
on the network without the Netbios protocol.

Plastic Man
 
What do you take me for, an idiot? You no good, yellow-bellied....

Uh wait, let me check first :-) Though the machine I'm using now is
on the network without the Netbios protocol.

Plastic Man
Click to expand...

you can join the network without the netbios protocol, but you just can't use
windows name translation or refer to a computer as it's network "name".

try to browse the computer by going to start->run and typing \\<ip address>

if it works this way, you most likely dont have netbios turned on. netbios
just translates your windows network name to an ip address to make it easier
to remember.

any luck?
 
Can you post an ipconfig here of say the server and of a working computer?
Does it have a static or does it have a dynamic IP address. I would guess a
static since it is a server, did you assign the laptop or anything else that
ip address temporarily and forget to remove it? Also if it is plugged into a
switch try rebooting the switch, I troubleshot a checkpoint problem one
night for around 8 hours before I realized it worked right within the first
5 minutes all I needed to do was bounce the switch.
 
Dynamic IP address, but on three week leases. The laptop did of course
get an address lease, but I thought those were computer specific, not
connection specific. I've just now deleted the lease.

We can try resetting the switch, but no other machine is problematic at
the moment.

We can ping the server from the problem client and vice versa.

Will ask the IT supervisor about posting the ipconfig data. He's
stubborn and hacker-paranoid.
 
Just set the trouble machine to a static and the problem has
disappeared. Possible lease issue then?
 
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