[CentOS] Help with sendmail ( or Iptables ... or DNS)

Fri Oct 6 15:17:26 UTC 2006
Departamento de Informatica <deptoinf at gmail.com>

OK, thanks, i will try it

2006/10/6, Lance Davis <lance at uklinux.net>:
> On Fri, 6 Oct 2006, Departamento de Informatica wrote:
>
> > Hi, i have a CentOS 4.4 running sendmail, with two network interfaces
> > (eth0 -> Internet , and eth1 Local Network), from the terminal (SSH) i
> > do
> >
> > telnet 127.0.0.1 25
> >
> > and it connects to sendmail (i think so), but
> >
> > from another server (external, and so from the same SSH terminal) i
> > try to connect to the Internet IP
> >
> > telnet 146.77.220.236 25
> > Trying 146.77.220.236...
> > telnet: connect to address 164.77.228.236: Connection refused
> > telnet: Unable to connect to remote host: Connection refused
> >
> > so i was thinking "it could be the fu...ing IPTABLES"
> >
> > from terminal execute
> >
> > iptables -L| grep smtp
> >
> > and the result is:
> >
> > ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:smtp
> >
> > so , if the sendmail service is up, what could be happen??
>
> sendmail by default - for security - doesnt listen on the external
> interface.
>
> You need to modify /etc/mail/sendmail.mc to say :-
>
> DAEMON_OPTIONS(`Port=smtp, Address=146.77.220.236, Name=MTA')dnl
>
> as well as the line that says 127.0.0.1 (if you want it listening on
> localhost)
>
> Then run 'make' in the /etc/mail directory and restart sendmail.
>
> Regards
> Lance
>
>
>
>
>
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