Background on questions:
I am ending my third month using linux. When I had gotten bakc from
spring break my comuter was going haywire, when I shutdown, and
restarted I realized that my root password had changed and so started a
week of getting things back in line (harware trouble complicated my
efforts at restoring root access.) Upon inspection , I've realized my
system has been inudated with intruders for at least a month with what
apears to me to be two completely different hakcing incidents (one
around the 27th of february where some suspect files apear in the '/'
directory, the intruder erased log files from this time as well and one
around the tenth to 17th of march in which they took over my system
over spring break for who knows what reasom.
Right now I have started going through some security books my brother
had, I have found "Practical Unix Security" by Garfinkel and Spafford,
but it is copywrighted for 1991, is it still worth going through or has
too much changed?
I need a quick security fix until I learn something anbout security,
will shutting down Telnet do it? How do I shut it down? And does the
default Linux FTP program pose a security risk to me as well? (I haven't
been able to log onto my computer via FTP so right now I am assuming it
a good security book recomendation would help me out as well.
As always, thank you in advance for any information.