LinuxQuestions.org - Cannot Telnet postfix port 25

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Cannot Telnet postfix port 25 - Connection failed

Ok..I am pulling my hair out to get postfix to respond to Telnet on port 25

The machine is Centos 6 i386 on Virtualbox with bridged network

This also has a webserver which is working fine

Local machine ip is 192.168.1.60

I can connect with putty and Winscp from local machines ( same subnet )and telnet on p22

So far I have done

Installed telnet telnet-server

Stoped iptables ( but have added to allow port 25 )

etc/hosts

Code:

127.0.0.1                localhost.localdomain localhost

::1                localhost6.localdomain6 localhost6

192.168.1.60        mail.ipabxsystems.com        server

etc/postfic/main.cf

Code:

myhostname = mail.ipabxsystems.com

mydomain = ipabxsystems.com

myorigin = $mydomain

inet_interfaces = all

mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain

mynetworks = 168.168.1.0/24, 127.0.0.0/8

etc/postfix/master.cf

Code:

smtp      inet  n      -      n      -      -      smtpd

25        inet        m        -        n        -        -        smtpd

inet_interfaces = all

C:\Users\Stuart>telnet 192.168.1.60 25
Connecting To 192.168.1.60...Could not open connection to the host, on port 25:
Connect failed

C:\Users\Stuart>

Code:

netstat -laptn | grep master

Code:

Last login: Sun Aug 28 09:46:47 2016 from 192.168.1.90

[root@mail ~]# netstat -laptn | grep master

[root@mail ~]#

Is your postfix running?
Maybe it doesn't use 'master' on Centos ...

maybe:

Code:

netstat -laptn | grep :25

Yes postfix is running ( and been restarted )

[root@mail ~]# netstat -laptn | grep :25
[root@mail ~]#

Well, it's not listening on port 25 on any interface.

Code:

[root@mail ~]# uname -a

Linux mail.ipabxsysems.com 2.6.32-642.4.2.el6.i686 #1 SMP Tue Aug 23 19:20:20 UT                      C 2016 i686 i686 i386 GNU/Linux

[root@mail ~]#

Code:

[root@mail ~]# cat /etc/centos-release

CentOS release 6.8 (Final)

[root@mail ~]#

Quote:

Originally Posted by descendant_command (Post 5597102)

Well, it's not listening on port 25 on any interface.

Yes I know...but why not...and how do I get it to listen...That is my question

I just cant work out why...

Your snippet from master.cf looks wrong, have you been messing about with it?

See http://www.postfix.org/master.5.html if you want to customise it.

edit: presumably there are no obvious clues in your mail.log?

Fixed typo... still no joy

Code:

smtp      inet  n      -      n      -      -      smtpd

25        inet        n        -        n        -        -        smtpd

inet_interfaces = all

Quote:

Originally Posted by descendant_command (Post 5597110)

Your snippet from master.cf looks wrong, have you been messing about with it?

See http://www.postfix.org/master.5.html if you want to customise it.

edit: presumably there are no obvious clues in your mail.log?

Yes. but only to add ( after much searching and reading )

Code:

25        inet        n        -        n        -        -        smtpd

inet_interfaces = all

Is that your entire master.cf??

The smtp service IS port 25 so those lines are a duplicate - don't know if that matters as I have never seen it misconfigured like that before.

inet_interfaces doesn't belong there!

Quote:

Originally Posted by descendant_command (Post 5597118)

BINGo....

Looks like that was the problem

Thank You (very much) :-)