Think In Geek

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security

Fast and easy way to block bots from your website using Apache

Some weeks ago the site I work on started having severe outages. It looked like the system was not able to fulfill the incoming requests fast enough, making the passenger queue to grow faster than new requests could be served. Looking at the rails logs it looked like some Chinese bot was crawling the entire site, […]

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Controlling the commands executed with xp_cmdshell on SQL Server 2005

SQL Server has a special extended stored procedure called xp_cmdshell. This procedure has a lot of power: it allows to execute any command line code on the machine hosting the SQL Server. Imagine you want to list all the files on C: on the SQL Server Windows host: you could write a T-SQL statement like […]

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