[rhn-users] Port 25 problems

[boliver at lvlomas.com]

Could someone please help me out here.  I have installed Red Hat 8 on a 
machine and I have upgraded to the latest version of Postfix ( with MySql 
support ).   I have built and installed postfix and everything seems to be 
working as it should, however, my machine does not seem to want to 
publically listen on port 25 when postfix is started.  It works great when 
I test it locally, but here is the output of a netstat on my system:

tcp        0      0 0.0.0.0:1024            0.0.0.0:*               LISTEN
tcp        0      0 127.0.0.1:1025          0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:3306            0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN
tcp        0      0 127.0.0.1:465           0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN
unix  2      [ ACC ]     STREAM     LISTENING     2113   private/rewrite
unix  2      [ ACC ]     STREAM     LISTENING     2117   private/bounce
unix  2      [ ACC ]     STREAM     LISTENING     2121   private/defer
unix  2      [ ACC ]     STREAM     LISTENING     2125   public/flush
unix  2      [ ACC ]     STREAM     LISTENING     2129   private/smtp
unix  2      [ ACC ]     STREAM     LISTENING     2133   public/showq
unix  2      [ ACC ]     STREAM     LISTENING     2137   private/error
unix  2      [ ACC ]     STREAM     LISTENING     2141   private/local
unix  2      [ ACC ]     STREAM     LISTENING     2145   private/virtual
unix  2      [ ACC ]     STREAM     LISTENING     2149   private/lmtp
unix  2      [ ACC ]     STREAM     LISTENING     2153   private/cyrus
unix  2      [ ACC ]     STREAM     LISTENING     2157   private/uucp
unix  2      [ ACC ]     STREAM     LISTENING     2161   private/ifmail
unix  2      [ ACC ]     STREAM     LISTENING     2165   private/bsmtp
unix  2      [ ACC ]     STREAM     LISTENING     2169   private/relay
unix  2      [ ACC ]     STREAM     LISTENING     2173   private/trace
unix  2      [ ACC ]     STREAM     LISTENING     2177   private/verify
unix  2      [ ACC ]     STREAM     LISTENING     2181   private/proxymap
unix  2      [ ACC ]     STREAM     LISTENING     1861 
/var/lib/mysql/mysql.so
ck
unix  2      [ ACC ]     STREAM     LISTENING     2106   public/cleanup
unix  2      [ ACC ]     STREAM     LISTENING     1728   /dev/gpmctl

You can see that it is not listening on port 25 at all.

Here is a snap shot of my IPTABLES:

# Firewall configuration written by lokkit
# Manual customization of this file is not recommended.
# Note: ifup-post will punch the current nameservers through the
#       firewall; such entries will *not* be listed here.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:RH-Lokkit-0-50-INPUT - [0:0]
-A INPUT -j RH-Lokkit-0-50-INPUT
-A RH-Lokkit-0-50-INPUT -p tcp -m tcp --dport 110 --syn -j ACCEPT
-A RH-Lokkit-0-50-INPUT -p tcp -m tcp --dport 3306 --syn -j ACCEPT
-A RH-Lokkit-0-50-INPUT -p tcp -m tcp --dport 22 --syn -j ACCEPT
-A RH-Lokkit-0-50-INPUT -p tcp -m tcp --dport 25 --syn -j ACCEPT
-A RH-Lokkit-0-50-INPUT -p tcp -m tcp --dport 80 --syn -j ACCEPT
-A RH-Lokkit-0-50-INPUT -i lo -j ACCEPT
-A RH-Lokkit-0-50-INPUT -p udp -m udp -s 216.223.128.151 --sport 53 -d 0/0 
-j ACCEPT
-A RH-Lokkit-0-50-INPUT -p tcp -m tcp --syn -j REJECT
-A RH-Lokkit-0-50-INPUT -p udp -m udp -j REJECT
COMMIT

As you can see from that, it should accept connects on port 25.

I have tried turning off IPTABLES all together with no luck.

My machine is wired to the internet via a DSL connection and there is no 
router in between it and the outside work.

Thanks.

Bryan