Softpanorama
May the source be with you, but remember the KISS principle ;-)

Contents Bulletin Scripting in shell and Perl Network troubleshooting History Humor

Postfix Connection Refused Problem

Suse 10.3- Postfix - Connection refused - LinuxQuestions.org

Background:

I recently came across this problem and after searching for hours I still did not get the entire solution in one thread. I eventually resolved the problem using other information picked up from other threads within the Linux Questions site.

I thought i would make it easier to find in one place by posting my solution here.

Problem:

After setting up Postfix and configuring the config files, when trying to access the server on port 25 by telnet to the localhost (127.0.0.1) we gain access to the server. If you telnet to another interface on the same machine for example 192.168.30.x on port 25 you get "Connection refused".

Solution:

Edit file - /etc/postfix/main.cf

Change:
From - #inet_interfaces = all
To - inet_interfaces = all

Change:

From - #mynetworks_style = subnet
To - mynetworks_style = subnet

Change:

From - mynetworks = 127.0.0.0/8
To - mynetworks = 192.168.30.0/24, 127.0.0.0/8
Edit file - /etc/postfix/master.cf
Change:
From - smtp inet n - n - - smtpd
To - 0.0.0.0:smtp inet n - n - - smtpd
Then restart the Postfix server:
/etc/postfix/postfix stop
/etc/postfix/postfix start

I hope this helps.

SuSE Re [SLE] postfix connection refused

From: Anders Johansson (andjoh_at_rydsbo.net)
Date: 04/06/04

  • Next message: Martin Mielke: "[SLE] softphone (SIP) with multiple profiles"
    To: suse-linux-e@suse.com
    Date: Tue, 6 Apr 2004 14:12:24 +0200
    

    On Tuesday 06 April 2004 07.46, David Rankin wrote:
    > Pierre,
     

    > Apr 6 00:21:49 Nemesis postfix/pickup[8054]: 8618118DA95: uid=0
    > from=<root> Apr 6 00:21:49 Nemesis postfix/cleanup[8153]: 8618118DA95:
    > message-id=<20040406052149.8618118DA95@Nemesis.rbpllc.com>
    > Apr 6 00:21:49 Nemesis postfix/qmgr[815]: 8618118DA95:
    > from=<root@rbpllc.com>, size=306 (queue active)
    > Apr 6 00:21:49 Nemesis postfix/smtp[8155]: connect to
    > mail.3111skyline.com[66.76.63.120]: Connection refused (port 25)
    > Apr 6 00:21:49 Nemesis postfix/smtp[8155]: 8618118DA95:
    > to=<david@3111skyline.com>, relay=none, delay=0, status=deferred (connect
    > to mail.3111skyline.com[66.76.63.120]: Connection refused)

    What do you see in /var/log/mail on skyline when this happens?

    > smtpd_recipient_restrictions = permit_mynetworks,reject_unauth_destination
    > smtpd_sasl_auth_enable = no
    > smtpd_sender_restrictions = hash:/etc/postfix/access

    What is in this file?

    Also, can you get mail to work on other machines/other setups? In other words,
    are you sure it isn't your ISP (or some other upstream firewall) filtering
    port 25?

    -- 
    Check the headers for your unsubscription address
    For additional commands send e-mail to suse-linux-e-help@suse.com
    Also check the archives at http://lists.suse.com
    Please read the FAQs: suse-linux-e-faq@suse.com
    



  • Etc

    Society

    Groupthink : Understanding Micromanagers and Control Freaks : Toxic Managers : BureaucraciesHarvard Mafia : Diplomatic Communication : Surviving a Bad Performance Review : Insufficient Retirement Funds as Immanent Problem of Neoliberal Regime : PseudoScience : Who Rules America : Two Party System as Polyarchy : Neoliberalism  : The Iron Law of Oligarchy : Libertarian Philosophy

    Quotes

    Skeptical Finance : John Kenneth Galbraith : Keynes : George Carlin : Skeptics : Propaganda  : SE quotes : Language Design and Programming Quotes : Random IT-related quotes : Oscar Wilde : Talleyrand : Somerset Maugham : War and Peace : Marcus Aurelius : Eric Hoffer : Kurt Vonnegut : Otto Von Bismarck : Winston Churchill : Napoleon Bonaparte : Ambrose Bierce : Oscar Wilde : Bernard Shaw : Mark Twain Quotes

    Bulletin:

    Vol 26, No.1 (January, 2013) Object-Oriented Cult : Vol 25, No.12 (December, 2013) Rational Fools vs. Efficient Crooks: The efficient markets hypothesis : Vol 25, No.08 (August, 2013) Cloud providers as intelligence collection hubs : Vol 23, No.10 (October, 2011) An observation about corporate security departments : Vol 23, No.11 (November, 2011) Softpanorama classification of sysadmin horror stories : Vol 25, No.05 (May, 2013) Corporate bullshit as a communication method : Vol 25, No.10 (October, 2013) Cryptolocker Trojan (Win32/Crilock.A) : Vol 25, No.06 (June, 2013) A Note on the Relationship of Brooks Law and Conway Law

    History:

    Fifty glorious years (1950-2000): the triumph of the US computer engineering : Donald Knuth : TAoCP and its Influence of Computer Science : Richard Stallman : Linus Torvalds  : Larry Wall  : John K. Ousterhout : CTSS : Multix OS Unix History : Unix shell history : VI editor : History of pipes concept : Solaris : MS DOSProgramming Languages History : PL/1 : Simula 67 : C : History of GCC developmentScripting Languages : Perl history   : OS History : Mail : DNS : SSH : CPU Instruction Sets : SPARC systems 1987-2006 : Norton Commander : Norton Utilities : Norton Ghost : Frontpage history : Malware Defense History : GNU Screen : OSS early history

    Classic books:

    The Peter Principle : Parkinson Law : 1984 : The Mythical Man-MonthHow to Solve It by George Polya : The Art of Computer Programming : The Elements of Programming Style : The Unix Haterís Handbook : The Jargon file : The True Believer : Programming Pearls : The Good Soldier Svejk : The Power Elite

    Most popular humor pages:

    Manifest of the Softpanorama IT Slacker Society : Ten Commandments of the IT Slackers Society : Computer Humor Collection : BSD Logo Story : The Cuckoo's Egg : IT Slang : C++ Humor : ARE YOU A BBS ADDICT? : The Perl Purity Test : Object oriented programmers of all nations : Financial Humor : Financial Humor Bulletin, 2008 : Financial Humor Bulletin, 2010 : The Most Comprehensive Collection of Editor-related Humor : Programming Language Humor : Goldman Sachs related humor : Greenspan humor : C Humor : Scripting Humor : Real Programmers Humor : Web Humor : GPL-related Humor : OFM Humor : Politically Incorrect Humor : IDS Humor : "Linux Sucks" Humor : Russian Musical Humor : Best Russian Programmer Humor : Microsoft plans to buy Catholic Church : Richard Stallman Related Humor : Admin Humor : Perl-related Humor : Linus Torvalds Related humor : PseudoScience Related Humor : Networking Humor : Shell Humor : Financial Humor Bulletin, 2011 : Financial Humor Bulletin, 2012 : Financial Humor Bulletin, 2013 : Java Humor : Software Engineering Humor : Sun Solaris Related Humor : Education Humor : IBM Humor : Assembler-related Humor : VIM Humor : Computer Viruses Humor : Bright tomorrow is rescheduled to a day after tomorrow : Classic Computer Humor

     

    The Last but not Least


    Copyright © 1996-2014 by Dr. Nikolai Bezroukov. www.softpanorama.org was created as a service to the UN Sustainable Development Networking Programme (SDNP) in the author free time. This document is an industrial compilation designed and created exclusively for educational use and is distributed under the Softpanorama Content License. Site uses AdSense so you need to be aware of Google privacy policy. Original materials copyright belong to respective owners. Quotes are made for educational purposes only in compliance with the fair use doctrine. This is a Spartan WHYFF (We Help You For Free) site written by people for whom English is not a native language. Grammar and spelling errors should be expected. The site contain some broken links as it develops like a living tree...

    You can use PayPal to make a contribution, supporting hosting of this site with different providers to distribute and speed up access. Currently there are two functional mirrors: softpanorama.info (the fastest) and softpanorama.net.

    Disclaimer:

    The statements, views and opinions presented on this web page are those of the author and are not endorsed by, nor do they necessarily reflect, the opinions of the author present and former employers, SDNP or any other organization the author may be associated with. We do not warrant the correctness of the information provided or its fitness for any purpose.

    Last modified: February 19, 2014