Bruteforce attacks shouldn't pose a real security risk to any server but are still annoying and clog up your logfiles. Many methods to block these break-in attempts exist, like BlockHosts, Fail2ban or rate-limiting incoming connections.read more.
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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