Jul
15
2011
ebalaskas: just finished a dovecot2…

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

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Jul
15
2011
ebalaskas: sorry !selinux, i have…

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

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Jul
14
2011
ssh brute force attack in 40min linux installation

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
Jul
14
2011
ebalaskas: http://balaskas.gr/blog/index.php/2011/07/14/ssh-brute-force-attack-in-40min-linux-installation/
Jul
14
2011
ebalaskas: waiting for !fdupes to…

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!

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Jul
14
2011
ebalaskas: first impressions !centos6 dvd…

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

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Jul
14
2011
ebalaskas: Save this file http://balaskas.gr/aurarchlinux.xml…

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

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Jul
13
2011
ebalaskas: WARNING: Hook ‘uresume’ uses…

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

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Jul
13
2011
ebalaskas: RT @hackerspacegr Python-gr July…

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

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Jul
12
2011
ebalaskas: Going to update 2…

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

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Jul
11
2011
ebalaskas: just learned about gutenberg…

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

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Jul
08
2011
ebalaskas: I’m attending PyGr meetup,…

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

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Jul
08
2011
ebalaskas: how to find your…

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

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Jul
07
2011
ebalaskas: @hackerspacegr waiting for hackfest5…

identica.png@hackerspacegr waiting for hackfest5 to start!

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Jul
07
2011
ebalaskas: why smartphones are useful…
Jul
04
2011
ebalaskas: Dont forget hsgr motto:…

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

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Jul
04
2011
ebalaskas: i understand that !transifex…

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

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