Category Archives: Computing

Hardware, software, computer science and the rest

SSL Certificate Agility with Postfix

Posted on 25 July, 2015 by Matthias Scheler

RFC 4492 and RFC 6460 introduced a number of TLS ciphers based on elliptic curve cryptography (ECC). While some of them are designed to work with RSA keys (which is what most encrypted website on the Internet are using at … Continue reading →

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DNSSEC for UK domains

Posted on 31 May, 2015 by Matthias Scheler

I finally got around to enable DNSSEC (Domain Name System Security Extensions) for my primary domain zhadum.org.uk. This extra layer of protection makes it much harder to forge DNS entries for my domain. Following the steps in this tutorial the … Continue reading →

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R.I.P. beaver

Posted on 21 February, 2015 by Matthias Scheler

Yesterday Markus’s server beaver was switched off after more than eight years of service. We initially had a lot of trouble with this machine because of a dodgy PCI network card that caused complete system hangs due to PCI bus … Continue reading →

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