Im not sure what smtp server you are using, if it's sendmail, then Marco Shaw's response is what you need : <advice type="good" author="Marco Shaw"> Something else to check out: http://www.linuxselfhelp.com/quick/sendmail.html Check #6, some versions of RedHat come with a 'secured' sendmail that will only listen on 127.0.0.1. The netstat suggestion will also point that out. Marco RHCE </advice> If you are using Postfix you want to edit /etc/postfix/main.cf In there you want to make sure you have inet_interfaces=all. Usualy postfix is compiled with this as the default action, but just in case, put inet_interfaces=all there and restart postfix. Wayner >>> Nagarjuna_Cherukuri@xxxxxxxxxxx 10/26/05 11:07 am >>> Yes, netstat -i shows me that port 25 is listening only for local host. [root@hydlmuk lib]# netstat -l | grep 25 You have new mail in /var/spool/mail/root [root@hydlmuk lib]# netstat -l | grep -i smtp tcp 0 0 localhost.localdom:smtp *:* LISTEN [root@hydlmuk lib]# How can change my smtp server configuration? -----Original Message----- From: Wayne Pinette [mailto:Wpinette@xxxxxx] Sent: Wednesday, October 26, 2005 11:31 PM To: Nagarjuna Rao Cherukuri; redhat-list@xxxxxxxxxx Subject: Re: unblock port 25 do a netstat -l and see if your program is listening to port 25 (smtp) for all interfaces and areas, or if it is just listening on localhost.localdomain. if it only shows listenting to smtp on localhos.localdom and not ont * or hostname, you need to reconfigure your smtp server to make sure it's listening on more than just localhost. Also, make sure your iptables isn't blocking port 25. The easiest way to ensure that is to turn it off while testing : /etc/init.d/iptables stop will do this. Wayner >>> Nagarjuna_Cherukuri@xxxxxxxxxxx 10/26/05 10:55 am >>> Hi, Can anyone tell me how to enable port 25 in my server? I am able to ping to this port as local host, but it is failing when try to ping using DNS. [root@hydlmuk lib]# telnet localhost 25 Trying 127.0.0.1... Connected to localhost.localdomain (127.0.0.1). Escape character is '^]'. 220 hydlmuk.ad.infosys.com ESMTP Sendmail 8.11.6/8.11.6; Wed, 26 Oct 2005 23:15:11 +0530 quit 221 2.0.0 hydlmuk.ad.infosys.com closing connection Connection closed by foreign host. You have new mail in /var/spool/mail/root [root@hydlmuk lib]# hostname hydlmuk [root@hydlmuk lib]# telnet hydlmuk 25 Trying 172.25.125.203... telnet: Unable to connect to remote host: Connection refused My nmap output is as follows. [root@hydlmuk lib]# nmap hydlmuk Starting nmap V. 2.54BETA22 ( www.insecure.org/nmap/ ) Interesting ports on hydlmuk.ad.infosys.com (172.25.125.203): (The 1528 ports scanned but not shown below are in state: closed) Port State Service 21/tcp open ftp 22/tcp open ssh 23/tcp open telnet 110/tcp open pop-3 111/tcp open sunrpc 143/tcp open imap2 1521/tcp open ncube-lm 5010/tcp open telelpathstart 5680/tcp open canna 6000/tcp open X11 22273/tcp open wnn6 22289/tcp open wnn6_Cn 22305/tcp open wnn6_Kr 22321/tcp open wnn6_Tw can anyone tell me how to resolve this issue? thanks nagarjuna **************** CAUTION - Disclaimer ***************** This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful. This e-mail may contain viruses. Infosys has taken every reasonable precaution to minimize this risk, but is not liable for any damage you may sustain as a result of any virus in this e-mail. You should carry out your own virus checks before opening the e-mail or attachment. Infosys reserves the right to monitor and review the content of all messages sent to or from this e-mail address. Messages sent to or from this e-mail address may be stored on the Infosys e-mail system. ***INFOSYS******** End of Disclaimer ********INFOSYS*** -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
