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Load Balancer performance: Benchmarking HAProxy on EC2 (Quick and Dirty Style)
Lies, Damn Lies, and Benchmarks…. I get quite frustrated with benchmarks because they are very hard to perform properly, and even when you do them properly its very hard to get any useful data from...
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For any poor sod who needs to deal with the PCI Data Security Standard (PCI DSS)
Any engineer dealing with PCI DSS compliance issues probably looses a little bit of the joy in life . Now don’t get me wrong, The PCI DSS has a laudable aim and is written quite well and mostly...
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Upstart Script for Collectd
We have been doing some internal testing with Collectd. “collectd gathers statistics about the system it is running on and stores this information. Those statistics can then be used to find current...
View ArticleEnhanced Microsoft IIS health checks using VBscript
By default, the load balancer uses a TCP connect to the port defined in the Virtual Service to verify the health of each real (backend) server. For IIS, this would typically be port 80. In many cases...
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How do you keep your development team happy?
Well its easy really, you let them buy some new toys to play with like 10Gb Switches and fiber cards which is our current little project (10Gb to our desktop workstations should be nice). The other...
View ArticleShell-shocked by shell shock? I give you “CMD Caret” ^&
There seems to have been so much hype over the recent bash bug, shell shock! And there were all the people in the Microsoft world thinking YES we are so cool we are NOT affected by it! Yea right I...
View ArticleXML Converter for Version 6.21 loadbalancer.org appliance
I was tasked last week with creating the long awaited XML updater, this will update customers XML files from v6.21 to v7.6.2. Until now we’ve instead offered a manual upgrade service free of charge to...
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Black Friday black out protection with HAProxy
The media industry had lots of fun at the expense of e-commerce outlets on Black Friday mercilessly reporting on site crashes and outages . My wife yelled that I needed to ‘fix the Internet’ when...
View ArticleSimple Denial of Service DOS attack mitigation using HAProxy
Denial of Service (DOS) attacks can be especially effective against certain types of web application. If the application is highly dynamic or database intensive it can be remarkably simple to degrade...
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Blocking invalid range headers using ModSecurity and/or HAProxy (MS15-034 –...
Microsoft quietly patched a fairly nasty little bug (MS15-034) in IIS last month: A simple HTTP request with an invalid range header field value to either kill IIS, reveal data or remotely execute...
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