Tag Archives: Linux

Observing packets on the wire flying by

Anyone who has ever tried to install a modem or configure an Internet connection has almost certainly wondered if there’s any traffic flowing back and forth from networks. Observing network traffic that is generated by a PC or Mac is … Continue reading

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Javascript IPsec configuration generator for site-2-site VPN gateways

Today, access to the internet is practically everywhere. Private communication across it is often taken for granted. There is an entire industry around secure┬ácommunication and a lot of the equipment used for securing network boundaries, VPNs specifically, relies on the … Continue reading

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Email and malware dissection, Part II

If you’re running a mail server on the Internet, you will surely be familiar with spam and malicious email. This post is the last part on how to identify and isolate malware in email while respecting your users’ email privacy. … Continue reading

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Resizing multiple images

I’m sure there are easier ways, and better I assume, to reduce the size of multiple images at once. But there was some point in time where I couldn’t resist the urge of solving this myself using ImageMagick and Tcl/Tk. … Continue reading

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