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A rchive Date
[ 19-10-2004 ]
Category
[ Information Technologies ]
sub-Categoy
[ Microsoft ]
      [http://www.uksecurityonline.com/husdg/windowsxp/close135.htm

      Disabling Distributed COM (this closes Port 135)

      Click on Start | Run | and enter: C:\WinNT\System32\Dcomcnfg.exe

      Then click on the Applications tab.

      Many programs "support" Distributed Communication (DCOM) but rarely ever use it. This includes such programs as Windows Media and Wordpad. When examining this option, look for third-party applications that might actually REQUIRE network support, as opposed to those that simply support it. To find out if these programs really require DCOM, you must disable it, run the programs, and see what happens.

      Note that it is probably only necessary to look at third-party programs here.

      Microsoft programs designed to run on a non-networked, stand-a-lone computer are usually written to support but do not require DCOM. To disable DCOM, go to the Default Properties tab and uncheck the box labeled "Enable Distributed COM on this computer".

      Reboot, and try running the third-party software noted as above. Odds are that everything will still run correctly. If not, go back and enable DCOM again. As you re-enable it, also go to the Default Protocols tab and remove all protocols except "Connection-oriented TCP/IP". This doesn’t create any additional security but does reduce the number of connection methods you have to keep an eye on.

      If you do not have to re-enable DCOM again, then on the Default Protocols tab remove all protocols. You won't need them, and that should stop Windows from listening on Port 135.]



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