Thanks this is good information as I learn little by little. Our IMC is on it's own separate box, so that would require port 25. The systems that house our users do not have a IMC's but pass mail to the dedicated IMC's, so they don't need port 25.
X.400...since it's used internally by 5.5, sounds as if I need it on all the Exchange systems. -----Original Message----- From: Greg Deckler [mailto:[EMAIL PROTECTED]] Sent: Thursday, November 21, 2002 3:13 PM To: Exchange Discussions Subject: Re: Port blocking SMTP & X.400 Without knowing exactly how you are configured, it is difficult to provide meaningful recommendations, but I'll give it a shot. In Exchange 5.5 if you do not have an IMC set up on it, then you should not need port 25. Same thing with X.400. If you are not running any X.400 connectors, then you should not need it. However, be a little careful here since Exchange 5.5, internally is X.400 based (Exchange 2000 internally is SMTP based) Those ports sound correct for the PDC and BDC, but I did not check to make absolutely certain. And again, without knowing your configuration and what you are trying to do with these systems, it is very difficult to provide any concrete advice. > We're in the process of locking down ports for our Exchange 5.5 deployment. > I've read the FAQ's and found ports required, but have a couple of > questions. > > If you have a Exchange Server with no IMC on it just mailboxes do you need > TCP 25 SMTP enabled. I would think it should only be enabled for the > servers with the IMC on it not on servers that only have mailboxes. > > X.400 TCP 102, Is this really required for Exchange Servers and if so what > is it used for. Looking at TechNet, its used by older messaging systems? > > For PDC and BDC's with no Exchange. What ports do I need for those guys > since they only perform authentification. Would that be TCP 137 & 139? > > Pete Pfefferkorn > Senior Systems Engineer/Mail Administrator > University of Cincinnati > 51 Goodman Street > Cincinnati, OH 45221 > Phone - (513) 556-9076 > Fax - (513) 556-2042 _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
