Most Exchange Server communications are based on Remote Procedure Calls (RPCs). If you are interested in finding out which ports are in use by RPC functions, you can use a utility called RPCDUMP.
According to Microsoft, RPCDUMP is a part of the Windows Server 2003 Resource Kit. However, the utility was available on my test server without me having to install the kit. If you need a copy of RPCDUMP, you can download it as part of the Windows Server 2003 Resource Kit Tools.
To use RPCDUMP to report on port usage, enter the following command:
Be prepared though. RPCDUMP gives you a whole lot of information related to port and RPC usage. Figure A shows a small portion of this output.
This is a fraction of the information produced by running the RPCDUMP /V command on an Exchange server.
|ABOUT THE AUTHOR:|
| Brien M. Posey, MCSE
Brien is a Microsoft Most Valuable Professional for his work with Windows 2000 Server and IIS. He has served as CIO for a nationwide chain of hospitals and was once in charge of IT security for Fort Knox. As a freelance technical writer, he has written for Microsoft, TechTarget, CNET, ZDNet, MSD2D, Relevant Technologies and other technology companies.