Category Archives: Uncategorized

Varnish Cache development news

Short update on activities in Varnish cache development: Work is being done on getting access to the request BODY inside Varnish. This feature has been requested for a while, particularly by the security.vcl guys. See daf0e2c. The 2013Q1 Varnish Developer Day will … Continue reading

Posted in Uncategorized | Tagged , | 2 Comments

New Varnish VMOD: Softer purges / invalidations

With the new softpurge vmod you can do cache invalidation in Varnish that only affects objects if your backend is up. This means that you can purge all you want, and in the normal case everything works as expected, but if … Continue reading

Posted in Uncategorized | Tagged , , , | 1 Comment

Varnishncsa and std.log()

New in Varnish 3.0.3rc1 is that you can put arbitrary log lines from VCL into the varnishncsa output. This can be used for funky stuff like logging the session cookie along with the request. Let’s say you have the following … Continue reading

Posted in Uncategorized | Tagged , , | Leave a comment

Mobile device detection in Varnish

As part of my DAY JOB[tm] I’ve been working on device detection with Varnish. There is some content about this on blogs here and there, but no single place to get rulesets or VCL. We want to fix that by … Continue reading

Posted in Uncategorized | Tagged , , | Leave a comment

Detecting IP-over-DNS, part two.

As mentioned earlier, I did some work on detecting IP-over-DNS traffic as a part of my masters degree from NTNU in Communication Technology with focus on information security. My final method was to, and this may be cheating, look at … Continue reading

Posted in Uncategorized | Tagged , | Leave a comment

Detecting IP-over-DNS

I wrote my master’s thesis at the Norwegian University of Science and Technology (NTNU) during the spring of 2010. My assignment was “Covert channels in the Domain Name System”, but for the most part it is about detecting an IP-over-DNS … Continue reading

Posted in Uncategorized | Tagged , | Leave a comment

Omron V3TU-1K magnetic card reader

This weeks Sunday activity: playing around with an Omron V3TU-1K magnetic card reader with USB interface. Second (or third, fourh .. ) hand, and of course no drivers to be found anywhere. [15293.788217] usb 4-1: new low speed USB device … Continue reading

Posted in Uncategorized | 2 Comments