[pchelpers] Re: Port 80 blocked

I have not tried this  --- Found it here--
http://beer234.blogspot.com/2008/10/port-80-blocked-windows-xp.html
Symptom: Port 80 Is Blocked On A Windows XP PC. Various browsers all produce
failures appearing because http is blocked IE port 80. Alternate ports like
HTTPS over 443 may work just fine. Other traffic besides port 80 may also be
blocked like ICMP (ping) or SSH on port 22.

This blocking behavior is usually due to a firewall being installed and
activated. First check the Windows XP firewall and disable that. Look in the
control panel, Windows Firewall icon. If this firewall is disabled check for
other software based firewalls installed like Zone Alarm or products from
Mcafee and Symantec like Norton or other personal firewall products.

In other cases we've seen port 80 blocked on Windows XP where no firewall
seems to exist. In the case i'm thinking of it was a Cisco VPN client that
was the problem. The Cisco VPN client has a Zone Alarm firewall. Sometimes
even after the Cisco VPN client is uninstalled port 80 is still blocked and
a user cannot use a browser to http but can use https. In this case try the
following solution.

Restart the Windows XP PC in Safe Mode.
Run Regedit.exe to open the registry editor.
Navigate to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\vsdatant
Click start in the right pane and modify the value to 3.
Restart the PC and port 80 should no longer be blocked and you can use http
with any browser.

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On Mon, Mar 9, 2009 at 6:16 PM, John Durham <john.modec@xxxxxxxxxx> wrote:

> Earlier I set up an internet connection for a client on an XP system.
> Although most settings look fine, it won't allow access via port 80, so
> no web pages are visible. For the last hour I searched for a way to
> unblock port 80 but even the search engines are vague on this. Maybe
> it's in the firewall settings. Anyone got clues to offer on this one?
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