what am I missing, getting SMTP to work

From: Mike Rambour (mikey_at_b2systems.com)
Date: 04/30/04

  • Next message: Ow Mun Heng: "RE: LVM-Howto [Was : what are the restrictions on bootablepartitions?]" 
    Date: Fri, 30 Apr 2004 02:15:41 -0700
To: fedora-list@redhat.com

      I am configuring a new machine and I can't get it to work. I am using
    Core1, all the patches and Postfix. I am trying to use my Linux box as a
    outgoing mail server from home and not use my ISP's SMTP, I can send mail
    from the Linux machine but not from my home machines (another Linux for me
    and Windows for my wife and daughter).

       the output of nmap is (From work to home not the same net) says smtp is
    Closed but I cant figure out why:
    PORT STATE SERVICE
    21/tcp open ftp
    22/tcp open ssh
    25/tcp closed smtp
    80/tcp open http

       my iptables looks like this
    ACCEPT all -- anywhere anywhere state
    RELATED,ESTABLISHED
    ACCEPT tcp -- anywhere anywhere state NEW tcp
    dpt:smtp
    ACCEPT tcp -- anywhere anywhere state NEW tcp
    dpt:http
    ACCEPT tcp -- anywhere anywhere state NEW tcp
    dpt:ftp
    ACCEPT tcp -- anywhere anywhere state NEW tcp
    dpt:ssh
    REJECT all -- anywhere anywhere reject-with
    icmp-host-prohibi

      I am using postfix and ps output says
    root 1735 0.0 0.4 7140 620 ? S Apr14 0:00 sendmail:
    accepting connections
    smmsp 1744 0.0 0.3 7316 412 ? S Apr14 0:00 sendmail:
    Queue runner@01:00:00 for /var/spool/clientmqueue

      I am guessing my problem is smtp being closed according to nmap. I did
    not install telnetd. On the linux machine, I can do telnet localhost 25
    and get into mail but I can not do telnet external_ip 25 gives me a
    connection refused as well as from the Windows machines.

       Those of you who are regulars on this list know I am a newbie but I have
    looked everywhere I can think of and even purchased "Postfix, the
    definitive guide" with no luck.

       This is the killer for me, I even did "service iptables stop" and it
    still did not work with the firewall turned off. I am not sure where to
    look now. At my work machine as was suggested by someone here on this
    list, I installed shorewall and I was going to do that here at home but
    since iptables stop didnt help, I dont think shorewall would help either.

      My configuration by the way is that the linux box is behind a Linksys
    router so the machine has a 192.168.1.30 address and is on my network. I
    have tried removing the Linksys and putting the Linux box directly on the
    net and on the linksys with the Linux IP in the DMZ and also just
    forwarding the ports...all 3 configurations gave the same result, port 25
    closed.

            mike

    ~~~~~ I'd rather be sailing and ~~~ .oooO  Oooo.  ~~~~~~~~~~~
    Mike Rambour                     (    )  (   )    
    Bug Writer er...Programmer  \   )   ( / 
          mikey@b2systems.com             \_)  (_/  
    **********************************************************************
    If you want to learn more about the ULTIMATE BRITISH sports car,
    then take a look at   http://www.singercars.com/
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 

    -- 
fedora-list mailing list
fedora-list@redhat.com
To unsubscribe: http://www.redhat.com/mailman/listinfo/fedora-list
  • Next message: Ow Mun Heng: "RE: LVM-Howto [Was : what are the restrictions on bootablepartitions?]"

    Relevant Pages