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 > -----Original Message----- > From: redhat-list-bounces@xxxxxxxxxx > [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of > Nagarjuna Rao Cherukuri > Sent: Wednesday, October 26, 2005 2:56 PM > To: redhat-list@xxxxxxxxxx > Subject: unblock port 25 > > > 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=subscribe > 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
