Well, talking about securing your box is really a serious shit, ive been trying to get a real good iptable script myself, i wrote many but still aint working that real good untill i found this amazing IPtables script Arnos IPtables script is really one of the best scripts i ever used .. enjoy ;-)
Traditionally, Unix/Linux/POSIX filenames can be almost any sequence of bytes, and their meaning is unassigned. The only real rules are that "/" is always the directory separator, and that filenames can't contain byte 0 (because this is the terminator). Although this is flexible, this creates many unnecessary problems. In particular, this lack of limitations makes it unnecessarily difficult to write correct programs (enabling many security flaws), makes it impossible to consistently and accurately display filenames, causes portability problems, and confuses users. more ....
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