How do I open a specific port for network?

linuxlover.chaitanya · 07-11-2008, 02:02 AM

This is the courierpassd file in xinetd.d

service courierpassd
{
disable = no
port=106
socket_type=stream
protocol=tcp
user=root
server=/usr/local/sbin/courierpassd
server_args= -s imap
wait=no
only_from=127.0.0.1
instances=4
}

Mr. C. · 07-11-2008, 02:10 AM

Ok, that looks good. This is configured to allow only localhost access to the service.

Now, what is the output of:

Code:

telnet localhost 106

linuxlover.chaitanya · 07-11-2008, 03:41 AM

Output for telnet localhost 106

Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
telnet: Unable to connect to remote host: Connection refused

Mr. C. · 07-11-2008, 03:52 AM

Ok, so it seems like you do not have xinetd running (or installed!). Check ps for xinetd or inetd. I assume you performed that test on the system running courierpassd.

linuxlover.chaitanya · 07-11-2008, 03:59 AM

This is the output of ps for xinetd

ps aux | grep xinetd
root 2972 0.0 0.0 2668 844 ? Ss 12:33 0:00 xinetd -stayalive -pidfile /var/run/xinetd.pid
root 3220 0.0 0.0 3884 704 pts/1 S+ 14:27 0:00 grep xinetd

And yeah I tried it on the same system running courierpassd

Mr. C. · 07-11-2008, 04:20 AM

Did you restart xinetd after you enabled the courierpassd server ? If not, run: /etc/init.d/xinetd restart

You should have a listening agent on port 106, as I mentioned a number of posts back. If there isn't one, then xinetd has not started the service.

linuxlover.chaitanya · 07-11-2008, 04:24 AM

I did restart xinetd service as well but still the same error.