> how can i know if there is a hole on my machine? > Something i don't know? You may never know, but you can try to keep things as secure as possible.
keep you patches/packages up to date...check for security updates. Run the tools that where suggested in the other posts. If you are using a 2.4.x kernel Use IPTABLES instead of IPCHAINS and use the features it has to offer to filter out bad packets and deny bad/unused ports/protocols as you need. You can always re-compile your kernel w/ the lsm patch added to it (be very careful). check out security sites and google. -+- kiran
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