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Jul
20
2011
default centos6 installation & pam errors
Posted by ebal at 05:53:51 in planet_ellak, planet_Sysadmin

Error:

   PAM unable to dlopen(/lib/security/pam_fprintd.so): /lib/security/pam_fprintd.so: cannot open shared object file: No such file or directory: 1 Time(s)
   PAM adding faulty module: /lib/security/pam_fprintd.so: 1 Time(s)

Solution:

authconfig –disablefingerprint –update

bug: 505266

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
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