c99 Shell Scripts are one of the main headache for almost all cPanel server administrators even though they use mod_security and all.
The c99 php (Hypertext Preprocessor) shell script is an awesome piece of hacking script. The only limitation of it being that it needs an unsecured uploader in order to get it uploaded and then the execution part is a piece of cake.
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A step by step paper how to secure linux server with cPanel/WHM and
Apache installed. By default, linux is not secured enough but you have
to understand there is no such thing as “totally secured server/system”.
The purpose of this paper is to understand how to at least provide some
kind of security to the server.
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Here are some useful things to know for managing an Exim 4 server. This assumes a prior working knowledge of SMTP, MTAs, and a UNIX shell prompt. Continue reading