/dev/blog

A tale of awesomazing sandcastles

Recently I noticed, that reading some code and text in the gnome terminal under Fedora is difficult for me, especially by low screen lightning on my laptop. The default color scheme has some really bright white foreground color and has been bothering me for some time, therefore I have searched a new color scheme, that appears less glaring to me. It should also support a enjoyable code syntaxhighlighting and have a good contrast.

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The last few months sysadmins, engineers and security components were on needles. Many security holes were found and patched. And in this case, patched means patched in the code, built binaries and pushed out by the sysadmins. Specially in the SSL/TLS segment, resp. openssl and its algorithms.

UPDATE (21. Oct 2017):
Needless to say, there is always improvement on security, so I updated the mentioned ciphers, protocols and configurations in this article.

But not everything can be patched if its weak by nature. There are protocols, which are now insecure and you should not...

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Yubikey is a great piece of hardware with a lot of functions in a size of an usb stick. Two of the stores are a gpg, and a pki applet, which each can hold gpg keys or x509 Certificates. The PKI applet can be used for storing certificates, which then can be used for signing emails (s/mime), authentication, even encrypting. Here is a little summary how I am using my yubikey.

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27 Jul 2016

Malware Must Die!

Everyone gets unwanted e-mails in his inbox and some are filtered by the spam filters or virus scanners, other get a way trough. My Spam filters are really good but this does not apply to malware mails and recently I got one. Usually I delete those and live goes on, but this time I was curious what this piece in my inbox would do.

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I'm working a lot with Django and Celery recently. By the way, awesome Open Source projects!   Celery is a simple, flexible and reliable distributed system to process vast amounts of messages.

For my project I have multiple celery workers, whose resides on different maschines, so called a distributed setup. Now the tasks which celery will execute are not deployed on the task calling maschine itself. therefore the task schedules needs some tuning how they are being called.

A typical celery task example from the docs is to import the task functions or classes and apply .delay() on them...

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