Evaggelos Balaskas - System Engineer

The sky above the port was the color of television, tuned to a dead channel

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Jul
15
2011
ebalaskas: just finished a dovecot2…
Posted by ebalaskas timeline at 16:59:58 in microblogging

identica.pngjust finished a dovecot2 installation for a small office <10users. It wasnt pretty!!! Seems that i have forgot some things about !dovecot

from Updates from ebalaskas on Identi.ca!

Jul
15
2011
ebalaskas: sorry !selinux, i have…
Posted by ebalaskas timeline at 14:47:56 in microblogging

identica.pngsorry !selinux, i have to disable you - it is really difficult to configure !centos with selinux enforcing. Especially when time is money!

from Updates from ebalaskas on Identi.ca!

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
Jul
14
2011
ebalaskas: http://balaskas.gr/blog/index.php/2011/07/14/ssh-brute-force-attack-in-40min-linux-installation/
Posted by ebalaskas timeline at 18:53:39 in microblogging

identica.pnghttp://balaskas.gr/blog/index.php/2011/07/14/ssh-brute-force-attack-in-40min-linux-installation/

from Updates from ebalaskas on Identi.ca!

Jul
14
2011
ebalaskas: waiting for !fdupes to…
Posted by ebalaskas timeline at 17:48:12 in microblogging

identica.pngwaiting for !fdupes to scan 100.000 files from a 1.5T partition takes almost the same time to install slackware from floppy disks!

from Updates from ebalaskas on Identi.ca!

Jul
14
2011
ebalaskas: first impressions !centos6 dvd…
Posted by ebalaskas timeline at 15:07:09 in microblogging

identica.pngfirst impressions !centos6 dvd installation: super fast, extremely easy process. Some people have learned from past mistakes

from Updates from ebalaskas on Identi.ca!

Jul
14
2011
ebalaskas: Save this file http://balaskas.gr/aurarchlinux.xml…
Posted by ebalaskas timeline at 08:40:11 in microblogging

identica.pngSave this file http://balaskas.gr/aurarchlinux.xml to your firefox searchplugins dir to search aur packages from firefox !archlinux

from Updates from ebalaskas on Identi.ca!

Jul
13
2011
ebalaskas: WARNING: Hook ‘uresume’ uses…
Posted by ebalaskas timeline at 17:24:04 in microblogging

identica.pngWARNING: Hook ‘uresume’ uses a deprecated ‘install’ function. This should be renamed ‘build’ http://balaskas.gr/wiki/uswsusp

from Updates from ebalaskas on Identi.ca!

Jul
13
2011
ebalaskas: RT @hackerspacegr Python-gr July…
Posted by ebalaskas timeline at 10:49:38 in microblogging

identica.pngRT @hackerspacegr Python-gr July Meetup today people! Στις 19:00 στο #hsgr http://ur1.ca/4oze8

from Updates from ebalaskas on Identi.ca!

Jul
12
2011
ebalaskas: Going to update 2…
Posted by ebalaskas timeline at 12:54:56 in microblogging

identica.pngGoing to update 2 centos 5.6 to #centos6 servers by dvd. Hopefully everything will turn ok. But i afraid that the Low of Murphy is near

from Updates from ebalaskas on Identi.ca!

Jul
11
2011
ebalaskas: just learned about gutenberg…
Posted by ebalaskas timeline at 11:12:03 in microblogging

identica.pngjust learned about gutenberg project http://www.gutenberg.org/

from Updates from ebalaskas on Identi.ca!

Jul
08
2011
ebalaskas: I’m attending PyGr meetup,…
Posted by ebalaskas timeline at 11:25:19 in microblogging

identica.pngI’m attending PyGr meetup, 13th July 2011 in Athens lanyrd.com/2011/pygr-july/ via @lanyrd

from Updates from ebalaskas on Identi.ca!

Jul
08
2011
ebalaskas: how to find your…
Posted by ebalaskas timeline at 09:15:55 in microblogging

identica.pnghow to find your key bindings ? open xterm and write: cat > /dev/null Then just type some ctr, alt and arrow keys !

from Updates from ebalaskas on Identi.ca!

Jul
07
2011
ebalaskas: @hackerspacegr waiting for hackfest5…
Posted by ebalaskas timeline at 14:34:51 in microblogging

identica.png@hackerspacegr waiting for hackfest5 to start!

from Updates from ebalaskas on Identi.ca!

Jul
07
2011
ebalaskas: why smartphones are useful…
Posted by ebalaskas timeline at 11:00:00 in microblogging

identica.pngwhy smartphones are useful when you are on a relationship: http://www.thedoghousediaries.com/comics/uncategorized/2011-06-03-de58a19.png

from Updates from ebalaskas on Identi.ca!

Jul
04
2011
ebalaskas: Dont forget hsgr motto:…
Posted by ebalaskas timeline at 18:10:27 in microblogging

identica.pngDont forget hsgr motto: “Be Excellent To Each Other…. Party On Dude” !

from Updates from ebalaskas on Identi.ca!

Jul
04
2011
ebalaskas: i understand that !transifex…
Posted by ebalaskas timeline at 07:41:48 in microblogging

identica.pngi understand that !transifex is all about translations, but with 1500 projects can easily be a search engine for opensource project

from Updates from ebalaskas on Identi.ca!

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