DNS issues on one laptop

[Guest]

I've got a super weird problem. I have one laptop that is unable to resolve
internet host names (like www.microosft.com) through any web browser, but
this only occurs on one network (the domain of which it is a member). When
the laptop is on any other network (free wireless at the coffee shop, etc.),
everything works just fine. All other machines on the domain work just fine.
I have verified all tcp/ip settings are correct (and identical to all other
machines on the network). This laptop can access internet sites by IP
address when on the domain. It seems as though it is a problem with the
laptop since all other machines on the domain have no problems, yet the
laptop has no problems when connected to any other network. Thus, it appears
to be a combination of this particular machine on this particular network.

Anyone have any ideas? Please let me know if you need clarification and/or
more information.

 

[Yves Leclerc]

Check the laptop's DNS configuration, when it is on the domain.

Is the laptop using DHCP service to get its IP address while on the domain?

Try "ipconfig /flushdns".

 

[Guest]

The laptop's DNS configuration while on the domain is identical to all other
working machines. Namely, the only DNS server configured on the client is
the DC.

The laptop is using DHCP to acquire its ip info, but this doesn't seem to
matter. I can put in static ip info and it does not change the behavior.

I have tried an ipconfig /flushdns, it does not fix the problem.

 

[Frankster]

Check the host file on the laptop (c:\windows\system32\drivers\etc\hosts

-Frank

 

[Guest]

The hosts file has not been modified from the default, and is identical to
the other machines that are working correctly.

 

[R. McCarty]

I'd check which LAC ( Local Area Connection ) is used. If on a
wired NIC, you can sometimes end up with multiple instances of
NICs that use different LACs each with different settings.

 

[Guest]

Good idea, but I've checked this out as well. This laptop can go wired or
wireless. When testing (and in normal use), only one or the other is
enabled, so there is only one LAC at any one time. I have verified this with
an ipconfig /all.

 

[DanS]

Good idea, but I've checked this out as well. This laptop can go
wired or wireless. When testing (and in normal use), only one or the
other is enabled, so there is only one LAC at any one time. I have
verified this with an ipconfig /all.

"R. McCarty" wrote:

What about what else is running when it is on the domain ? They are 2
separate profiles correct ?

 

[HeyBub]

I've got a super weird problem. I have one laptop that is unable to
resolve internet host names (like www.microosft.com) through any web
browser, but this only occurs on one network (the domain of which it
is a member). When the laptop is on any other network (free wireless
at the coffee shop, etc.), everything works just fine. All other
machines on the domain work just fine. I have verified all tcp/ip
settings are correct (and identical to all other machines on the
network). This laptop can access internet sites by IP address when
on the domain. It seems as though it is a problem with the laptop
since all other machines on the domain have no problems, yet the
laptop has no problems when connected to any other network. Thus, it
appears to be a combination of this particular machine on this
particular network.

Anyone have any ideas? Please let me know if you need clarification
and/or more information.

It's okay. I can't resolve www.microosft.com either.

 

[Guest]

Do you have separate domain and standard Windows firewall profiles, possibly
with port 53 inadvertently blocked on the former? With the windows firewall
you can set the scope of exceptions to allow/block all computers, computers
by subnet, or a custom list. Try using the "netsh firewall show config"
cmd-line utility to elucidate your firewall settings as a possible source of
the problem. Alternatively, use the Netmon.exe or the free Ethereal network
monitor to analyse your packet traffic while attempting to resolve internet
names.

Let us know what you find...