Infos zu Linux und die Unterlagen zu den Linux-Kursen am Wifi Wien.

Putting fail2ban to good use: whitelisting SSH logins

Posted Sat, 2012-03-03 01:23 by Wolfgang Karall

I don't like fail2ban all that much (neither do I like denyhosts or other similar software, I'm really egalitarian there), because it is based on the idea of using blacklists. Which don't work. If you don't believe me and rather believe more famous people, read http://www.codinghorror.com/blog/2007/12/blacklists-dont-work.html

mysql-server while upgrading Debian 5.0 (lenny) to 6.0 (squeeze)

Posted Tue, 2012-02-21 19:11 by Wolfgang Karall

I'm currently doing plenty of upgrades to Debian 6.0 for customers who tried to wait till the last moment, after all Lenny's security support ended on 9th of February, see http://www.debian.org/News/2012/20120209

Help, ssh is eating up all my standard input!

Posted Fri, 2011-10-21 23:09 by Wolfgang Karall

If you're running ssh inside a shell script that's reading from standard input (stdin), beware that the ssh execution will drain stdin unless you use the -n option.

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