Got it. Thanks a lot! Joon
----- Original Message ----- From: "Pong" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, March 20, 2002 5:48 PM Subject: Re: [plug] SMTP Ports Question > > > On Wed, 20 Mar 2002, Joon Guillen wrote: > > > Does the SMTP service use the same port (25) to connect and forward the > > outgoing e-mails to its designated mail servers or do they use the ports > > above 1023? And, will the remote mail server need to respond to it (as an > > acknowledgement, or maybe something else)? > > > > when connecting to remote mail servers, the destination port will always > be 25 (SMTP standard). while source port will always be above 1023 for > qmail running as a non-root process. > > what acknowledgement are u referring to? the tcp handshake? you must > allow outgoing SYN packets towards remote destination port 25. > > > > I'm doing firewall rules, and I'd like the rules to be as specific as > > possible. I'm using qmail and qmail-smtpd btw. > > qmail-remote is the subprocess that delivers outgoing mail from your mail > server. qmail-smtpd only receives incoming mail and is the one bound to > port 25 on your mail server. > > pong > > _ > Philippine Linux Users Group. Web site and archives at http://plug.linux.org.ph > To leave: send "unsubscribe" in the body to [EMAIL PROTECTED] > > To subscribe to the Linux Newbies' List: send "subscribe" in the body to [EMAIL PROTECTED] > _ Philippine Linux Users Group. Web site and archives at http://plug.linux.org.ph To leave: send "unsubscribe" in the body to [EMAIL PROTECTED] To subscribe to the Linux Newbies' List: send "subscribe" in the body to [EMAIL PROTECTED]
