Hello anyone,

I'm using the operating System Linux - RedHat9
I'm totally a newbie in linux-security and that's why I've got a Problem:
A month ago, I got hacked by someone 3 times!
I always had to reinstall my distribution for security reasons.
Poeple in groups.google suggested to do so after a successful hack.
I changed the _standard known_ portnumbers and I denied the access for all
incoming internet connections to the ports 0-1024 and mysql per protocol tcp
and udp in my ipchains.
Is that enough or - what should else should I do to prevent him/her from
hacking into my computer again (and it would be nice if i could trace him
back and do something about it)
Any suggestions?