port list blocked by windows2000 security hotfix?

Posted on 2005-03-07
Medium Priority
Last Modified: 2010-05-18
Hi.  After applying the microsoft security hotfix, a application has not worked in proper.
When I remove the security patches, it become to be ok.

I assume that some hotfix may block a port used in the application, but I cannot find any port information
related with the security hotfix. Where can I know the information?
Question by:friwithu
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LVL 35

Expert Comment

by:Nirmal Sharma
ID: 13483611
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: -


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.
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: -

Let me know.

LVL 35

Expert Comment

by:Nirmal Sharma
ID: 13483616
Also i forgot to ask you one thing...do you remeber which Hotfix you installed name of hotfix, No. etc.?

Author Comment

ID: 13483698
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.
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LVL 35

Expert Comment

by:Nirmal Sharma
ID: 13483776
Are you using Windows Media Player as application ?
LVL 35

Expert Comment

by:Nirmal Sharma
ID: 13483783
The last hotfix will block the Port 7007. You need to open this port in Windows Media Firewall.
Check this: -

LVL 35

Accepted Solution

Nirmal Sharma earned 750 total points
ID: 13483793
Stream type: MSBD distribution stream
Protocol used: TCP MSBD 1
Port used: 7007
Special notes: For server-to-server communication, TCP7007 is the default. However, when you are doing server-to-server MSBD connections and one server is already using port 7007, additional connections can be made on a random port in the 1024-5000 range. In some cases, such as Windows Media Encoder to server, this port can be changed to use a value between 1 and 65000. If you are using a Windows Media Encoder configured to use a stream alias to connect to a Windows Media server, you must open the appropriate ports for DCOM to pass through the firewall. See the DCOM notes below for more information.

Ref: -  http://support.microsoft.com/default.aspx?scid=kb;en-us;Q189416

LVL 35

Expert Comment

by:Nirmal Sharma
ID: 13733175

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