Category Archives: Security

640000 rounds shadow benchmarking

So the requirement was, “use SHA512 for /etc/shadow, but with 640000 rounds instead of the default 5000, to slow down brute force attacks”. (Not sure why exactly 640000 though.) Continue reading

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FTPS vs. SFTP, once and for all.

I had to provide an explanation about the differences between FTPS and SFTP today, which sound so similar, but are in reality extremely different and can easily confused by those who don’t spend lots of quality time with them. SFTP … Continue reading

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OpenSSH connection multiplexing

The Challenge I was in touch with a developer the other day who used SSH to programmatically connect to a remote machine where he would start some kind of processing job. Unfortunately, he was in trouble when he wanted to … Continue reading

Posted in Security, UNIX & Linux | Tagged , , | 3 Comments