Evaggelos Balaskas - System Engineer

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ebalaskas: http://balaskas.gr/blog/index.php/2011/07/14/ssh-brute-force-attack-in-40min-linux-installation/ »
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« ebalaskas: sorry !selinux, i have...
Jul
14
2011
ssh brute force attack in 40min linux installation
Posted by ebal at 18:54:59 in planet_ellak, planet_Sysadmin

WTF, in only 40min, ssh brute force attack !

Jul 14 17:54:56 server1 sshd[1135]: Server listening on 0.0.0.0 port 22.
…
Jul 14 18:36:16 server1 sshd[2325]: Invalid user center from 70.38.23.166

thank Venema for TCP Wrapper

I believe that this is a security risk for new installations.

Ok, root cant ssh access the server.
But common!

We create a simple user to login and then su to root.
I dont want ssh daemon to be started by default, before i finished with my linux server configuration and add some security measures to prevent issues like that.

And the most significant part is that i had configured my router sshd port to a non known tcp port !!!!

Tag(s): centos, ssh
    Tag: centos, ssh
ebalaskas: http://balaskas.gr/blog/index.php/2011/07/14/ssh-brute-force-attack-in-40min-linux-installation/ »
  -  
« ebalaskas: sorry !selinux, i have...

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