port list blocked by windows2000 security hotfix?

First you need to know which port is used by this application. Generally Microsoft Hotfixes will close any unused ports in your system. If you apply this Hotfix while application is running it will not block the port and will leave it open for that application. If you are not sure which port is used by this application then you can download a program called FileMon from Sysinternals. This program can be used to see which port is used by this application.

Download FileMon from Sysinternals: -
http://www.sysinternals.com/ntw2k/source/filemon.shtml

Or

You can follow the steps to know the ports used by this application: -

1. Uninstall the hotfix first.
2. Run the application.
3. In command prompt give the command: - Netstat -n...you will see a port listening for the application.
Or
You can download a port scannber from website and after running the application scan for open ports. This program will list all the open ports used by this application: -

Download Local Port Scanner: -
http://www.webattack.com/download/dllps.shtml

Let me know.

Thanks
SystmProg

Also i forgot to ask you one thing...do you remeber which Hotfix you installed name of hotfix, No. etc.?

The hotfix occuring the symptom is below
--------------------------------------------------------
Microsoft VGX Q833989
Windows 2000 hotfix - KB329115
Windows 2000 hotfix - KB885836
Windows Media Player hotfix[KB837272]
--------------------------------------------------------

And the application is using the port 7007.

Are you using Windows Media Player as application ?

The last hotfix will block the Port 7007. You need to open this port in Windows Media Firewall.
Check this: -
http://www.microsoft.com/windows/windowsmedia/serve/firewall.aspx#administrator

Thanks!