Don't use the following insecure services. Most of these services
are enabled or disabled from linuxconf,
/etc/xinetd.d/* or /etc/inetd.conf.
rsh (remots shell)
rlogin (remote login)
finger (who really needs to know who is logged into your computer
from another computer? You can always use w)
sendmail (smtp) (sendmail should only be run on e-mail servers)
snmp (Simple Network Management Protocol)
If you need telnet, rsh, rlogin, consider using ssh instead.
If you need to close port 6000 (X11 ports), you can usually close
them if you use "-nolisten tcp" option when the X server is started.
There are many locations and ways to start the X server. If you are
using Gnome, you can edit /etc/X11/gdm/gdm.conf and make the following