Hi On Tue, Jan 28, 2014 at 03:00:43PM +0800, lina wrote: > >> I read something online, and wonder: > >> 1] shall I close the port 123 > > > > Probably you should, unless you're providing ntp to some other hosts.s > > I have disabled the ntp. Here is other two things: > > 1] about port 631, can I turn it off? since I only print very > occasionally, I don't know the real purpose of cupsd; > > 2] I don't know why the dhclient occupy several ports to listen, and > what's a little annoying is that seems my IP address barely changed even > I reboot after one night. > > > # netstat -nltup > Active Internet connections (only servers) > Proto Recv-Q Send-Q Local Address Foreign Address > State PID/Program name > tcp 0 0 127.0.0.1:631 0.0.0.0:* > LISTEN 3288/cupsd > tcp 0 0 127.0.0.1:25 0.0.0.0:* > LISTEN 3776/exim4 > tcp 0 0 127.0.0.1:2628 0.0.0.0:* > LISTEN 3268/0 > tcp6 0 0 ::1:631 :::* > LISTEN 3288/cupsd
cups is only listening on port 631 on localhost (=127.0.0.1 in ipv4 and ::1 in ipv6) - it is not open to the outside world. -- Karl E. Jorgensen -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20140128111153.GA12055@hawking