Monthly Archives: December 2015

32C3 Review Part 1

I visited the 32C3, the annual Hacker conference organized by the CCC and many many volunteers. Here is the first part of a short list of recommended videos (Day 1 of 4): Part1 – annual must-see talks: The Opening is … Continue reading

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Link collection of the week

Another link collection with cool stuff from the past week: Turning the database inside out with Apache Samza How to do code reviews Why mongodb sucks Problems with SHA1 deprecation in SSL Certs Counterfeit of electronic components We Are All … Continue reading

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Why the internet sucks part 3

[Here is part one, and here part two] Just a quick follow up notice: Cogent (a Tier 1 carrier) seems to be really pissed about the Deutsche Telekom and their peering policy, so they filed a suit against them.

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Fiddling with duply and ed25519 keys

I’m using duply for my backups, the config is very simple (/root/.duply/backup/conf): GPG_KEY=’IDOFMYGPGKEY’ GPG_PW=’PASSWORD’ GPG_OPTS=’–compress-algo=bzip2′ TARGET=’sftp://user@storage01.server.de:22//user’ SOURCE=’/’ DUPL_PRECMD=”nice -n 20 ionice -c 3″ MAX_AGE=2M MAX_FULL_BACKUPS=8 MAX_FULLBKP_AGE=1W DUPL_PARAMS=”$DUPL_PARAMS –full-if-older-than $MAX_FULLBKP_AGE ” VOLSIZE=512 DUPL_PARAMS=”$DUPL_PARAMS –volsize $VOLSIZE ” VERBOSITY=4 DUPL_PARAMS=”$DUPL_PARAMS –asynchronous-upload ” I … Continue reading

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Link collection of the week

Here is another collection of links that I’ve found/read in the past week: Have Static Languages Won? Locked doors, headaches, and intellectual need Embedded System Code Review Checklist How to deal with compromised servers How to write software that Ops … Continue reading

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Securing Postfix on a shared Webserver

I’m operating a webserver for shared webspace accounts. I’m not responsible for the stuff hosted on the webspace, but for the server itself. Many people like to host their wordpress or joomla on this server, both scripts are well known … Continue reading

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Fighting PHP spam

A good friend owns a very old joomla website which has been hacked. It is massively sending spam, how can we investigate this? First of all, reject outgoing mails in your firewall (ferm.conf style): Now we have time to investigate. … Continue reading

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