Mike Rambour wrote: > 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). > See my inserts below... > 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 Based on the above ps output, your running sendmail, not postfix. Sendmail, by default, is configured to only listen on localhost. If your wanting to use postfix as your MTA, then please run "redhat-switch-mail" to configure the proper links in /etc/alternatives. > > 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. Actually having postfix running on your box should help with the above. :-) > > 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. You will still need to configure your linksys box to forward port 25 to your linux box after you fix the above problems. Steve Cowles
