Joe, can you confirm the app that's listening on that port? Do you have other applications on the client that might be using that port to connect?
What kind of traffic do you see destined for that port on the wire? There's no set reason that port would be used out of the box that I'm aware of other than just luck. One other thing to check: Windows XP SP2/Ol2003 have a way to get around the update port used without specifying the server to listen on a particular port. This allows UDP notifications even with the firewall enabled. What they do is pre-seed the registration of the client for new mail notification via GPO settings. I haven't looked on the wire to see if the client will poll the server on that same port in the case of not getting a new mail notification after a certain amount of time, but I suppose that's possible. It's supposed to result in the client listening on a predetermined UDP port vs. talking to the server on a predetermined TCP port. -ajm -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Pelle, Joe Sent: Monday, February 14, 2005 10:52 AM To: [email protected] Subject: RE: [ActiveDir] OT:Exchange 2003 TCP 18053 Tony, Thanks for the quick response! It doesn't appear that we have a static port assigned though. Joe Pelle Senior Infrastructure Architect Information Technology Valassis / IT 19975 Victor Parkway Livonia, MI 48152 Tel 734.591.7324 Fax 734.632.6151 [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> http://www.valassis.com/ <http://www.valassis.com/> This message may have included proprietary or protected information. This message and the information contained herein are not to be further communicated without my express written consent. ________________________________ From: Tony Murray [mailto:[EMAIL PROTECTED] Sent: Monday, February 14, 2005 10:36 AM To: [email protected] Subject: RE: [ActiveDir] OT:Exchange 2003 TCP 18053 Could be that you have a statically mapped port assignment for a particular service (NSPI Proxy, IS, SRS, etc.). Check out the following article. You can the look for the corresponding registry entries. http://support.microsoft.com/kb/270836 Tony ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Pelle, Joe Sent: 14 February 2005 16:28 To: [email protected] Subject: [ActiveDir] OT:Exchange 2003 TCP 18053 Hello! When I do a netstat -an on my Exchange 2003 server I see a lot of connections on TCP 18053. All of our email clients connect to this Exchange server and just about all of them appear to have a connection via this port. No one seems to have any idea what that traffic could be... Does anyone have any ideas? Any help or insight is greatly appreciated! Joe Pelle Senior Infrastructure Architect Information Technology Valassis / IT 19975 Victor Parkway Livonia, MI 48152 Tel 734.591.7324 Fax 734.632.6151 [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> http://www.valassis.com/ <http://www.valassis.com/> This message may have included proprietary or protected information. This message and the information contained herein are not to be further communicated without my express written consent. List info : http://www.activedir.org/List.aspx List FAQ : http://www.activedir.org/ListFAQ.aspx List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/
