[SOLVED] How to close listening port in Ubuntu 10.04

unraisedarc · 07-07-2010, 09:51 PM

I know that ports are, by default, not filtered; they simply don't respond to requests if there are no services listening on the port. Well, running netstat -tulpn gives:

Code:

tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      -               
tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      -               
tcp        0      0 0.0.0.0:7654            0.0.0.0:*               LISTEN      2106/transmission
tcp6       0      0 :::22                   :::*                    LISTEN      -               
tcp6       0      0 ::1:631                 :::*                    LISTEN      -               
tcp6       0      0 :::7654                 :::*                    LISTEN      2106/transmission
udp        0      0 0.0.0.0:57366           0.0.0.0:*                           -               
udp        0      0 0.0.0.0:68              0.0.0.0:*                           -               
udp        0      0 0.0.0.0:7654            0.0.0.0:*                           2106/transmission
udp        0      0 0.0.0.0:5353            0.0.0.0:*                           -

And running sudo lsof -i tcp:631 gives

Code:

COMMAND  PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
cupsd   1156 root    6u  IPv6   5081      0t0  TCP localhost:ipp (LISTEN)
cupsd   1156 root    7u  IPv4   5082      0t0  TCP pc002-laptop:ipp (LISTEN)

I want to end the services that are listening on port 631, but I'm not sure how to do that. Some sources say xinit.conf, others say init.conf, and others say /etc/services, but I don't really know what to do so that this cupsd doesn't start automatically. I do not run a printing server on this box.

Thanks!