converting postfix port 25 to a port that is not blocked

[mjr]

hi
i have finaly figured out how to set up postfix
i am using fedora 5
yeah !!!!!

after i set it up i tried email to an outside server but it wouln't go through so i called my isp

i found out my port was being blocked

so i thought i will just change the port
the problem is how and what port should i use ??
and another problem is that i set up my postfix though fedora unity or fedora solved what ever

here is the link
http://fedorasolved.org/server-solut...x-mail-server/
i am afriad if i go blinly tampering with the setting i may screw somthing up and another is that i do not know if any of the setting i set before would not work because i changed ports on smpt

a reply would make me gratful in saying thank you

please help me

[Zigzagcom]

Google: change default port postfix
let me find something better

http://groups.google.com/group/maili...39f9cdf766a69e

The directive in /etc/postfix/master.cf uses "smtp", which it pulls from /etc/services. If you replace it with a port number, say 2025...then it is numerically hardcoded.
But you want to make sure that whatever port you choose is availble. Open your firewall for it as well.

[mjr]

thanks
now i tried that port in telnet through localhost it worked
but then i tried it in telnet from outside my router
if you can see it is not working outside

[root@licut da]# telnet localhost 2025
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
220 licut.is-a-geek.net ESMTP Postfix
exit
502 Error: command not implemented
bye
502 Error: command not implemented
quit
221 Bye
Connection closed by foreign host.
[root@licut da]# telnet www.licut.com 2025
Trying 24.117.3.30...
telnet: connect to address 24.117.3.30: Connection refused
telnet: Unable to connect to remote host: Connection refused
[root@licut da]#

i am positive that my router is not blocking this port
another thing is that i can get it to work through 80 but not 2025


thank you so far

[Duli]

Found this good explanation:

Sherman,

Thank you VERY much for this response. Sorry for the late reply. I've been
covered up.

This worked great! One minor addition to the procedure is to run this
command afterward:
cp /etc/services /var/spool/postfix/etc/services

Otherwise you'll get warnings in your logs.

Thanks again,
Shaman

----- Original Message -----
From: "Sherman Boyd" <shermanb_at_clh.com>
To: <engarde-users_at_engardelinux.org>
Sent: Tuesday, June 12, 2001 7:34 PM
Subject: RE: Postfix port change

> Shaman,
>
> I tried a google search and came up with this posting:
> ------------------------------------------------
> On Fri, Oct 06, 2000 at 01:03:27PM +0930, Ian Hogben wrote:
> > I have edited my /etc/services file to change the smtpd 25/tcp line to
> > "5000/tcp". But lo and behold the darn MTA not only *listens* on port
5000,
> > but it tries to send to other mailservers on 5000. In effect, I've
broken my
> > ability to send Emails out.
> >
> > How can I configure postfix to listen to port 5000 but send to port 25?
>
>
> Add a line to your /etc/services:
>
>
> smtp2 5000/tcp
>
>
> Now edit your master.cf so the smtpd line starts with smtp2:
>
>
> smtp2 inet n - n - - smtpd
>
>
> (actual line may vary depending on chroot, etc)
>
>
> Restart Postfix.
>
>
> --
> Drew Bloechl
> drew_at_cesspool.net
> PGP key ID: 33855516