Protecting Linux against automated attackers

last updated in Categories News

So you wanna block script kiddies? Most of the new crackers who wanna crack your server they use port scanners, dictionary attacks and what not… Blocking them automatically is the subject of this article.


It discuss how to protect Linux against automated attacks using tools. It is worth to read it. Before reading this I had my small perl script which is used to monitor /var/log/secure and if more login failed attempt found it will send an email to us and then we use to block IPs at router/server itself.


Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.

1 comment

  1. 100 years ago , bankers solved
    the problem ..
    Hacker succeeds in guessing a P.W.
    but he gets one chance to
    guess a “scratch” number ,
    on a users list .
    Also , if SU needs to suspend
    that P.W. , its trivial .
    SU hands out lists of
    scratch numbers to remote users .
    Admins create scripts , that make them
    look like Wizards …
    Why learn Linux , if you dont have to ?
    There is no faster way to
    work Linux , than to forget the syntax .

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