xp pro connecting to win2k server file share over port 80?

[Michael Parisi]

My firewall is blocking port 80 from my file server since
it is strictly a file server. The traffic log on the
firewall shows my windows xp pro clients trying to
connect to the file server over tcp port 80 and are being
blocked. This is causing a long delay when a user tries
to open a mapped network drive to a file share on the
file server. Once the connection is made and the folders
and file are displayed users can close the file share and
reopen the mapped drive immediately without delay. The
delay then reappears if they reboot the computer or wait
an unknown amount of time before reopening the share. If
I add a rule allowing tcp port 80 to the file server the
delay is gone. Why is windows XP using port 80 to
connect to file shares on a windows 2000 server?

Thanks,
Mike

 

[Marc Reynolds [MSFT]]

Do you have XP Service Pack 1 installed? If not install it.

If you already have SP1 the check the order of 'Network Providers'

a. On the desktop, right-click 'My Network Places', and then click
Properties.
b. On the Advanced menu, click 'Advanced Settings'.
c. Click the 'Provider Order' tab.
d. In 'Network Providers', click the 'Web Client Network' provider,
and then click the Down Arrow button so that it is the last one in the
list.
(Ensure that 'Microsoft Windows Network' is listed with higher
priority.)
e. Click "OK"

'Web Client Network' should be at the bottom by default. You can also find
the Provider order in the registry at


HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\NetworkProvider\Order\Pr
oviderOrder
The default order for the ProviderOrder value is:
RDPNP,LanmanWorkstation,WebClient



--

Thanks,
Marc Reynolds
Microsoft Technical Support

This posting is provided "AS IS" with no warranties, and confers no rights.