[Lilux-help] Help with nmap (and ssh)

OK, so I'm paranoid... I checked my own computer with nmap and got the following result: Interesting ports on $MYHOST ($MYIPADDRESS): (The 1641 ports scanned but not shown below are in state: closed) Port State Service 22/tcp open ssh 111/tcp open sunrpc 6000/tcp open X11 Nmap run completed -- 1 IP address (1 host up) scanned in 0.612 seconds Now some more details; I was running nmap in user mode, not as root, I know the result would be different, for the time being I'll work with this, I'll check more later. About the results : I'm a bit surprised that ssh is opened, I don't remember setting up any sshd daemon, however, I remember Brent doing something on my machine during the Linuxdays, so it's not entirely impossible, I will disable it for the time being. I'm a bot more worried about the other two. I don't see what I might be doing with Sun's RPC and wish to disable this (any hint welcome). The same is true about X11; could anyone tell me why X11 is opening a port on my machine, I don't intend to have anyone connect via X11 to my host. I expect I may have to toy with inetd and other startup scripts in order to disable the nasty services/daemons. I hope I won't screw up my system too much or too fast. About ssh, is there a way how I can set up some identification so that only specific remote users or users from specific hosts may connect to my system through ssh? Would "anyone" be able to connect (assuming s/he knows a username & password on my system)? thanks Serge -- ---------------------------------------------------------------------- 'Software patents kill technical innovation" ---------------------------------------------------------------------- Serge Marelli, E-mail : serge.marelli(a)linux.lu ---------------------------------------------------------------------- LiLux : http://www.linux.lu/ Protecting Innovation against Patent Inflation http://swpat.ffii.org/ over 200,000 votes & 2000 firms against software patents http://noepatents.org/