Author Archives: acastaner

About acastaner

I'm the EMEA Technical Lead for Application & Security at Spirent. I specialize in layer 4-7 technologies, Cloud, Programming and CyberSecurity.

Avalanche 4.86 released


On Friday May 30th we released a new version of Avalanche. The list of feature isn’t huge, but they are Really Good Features. First, Avalanche now supports Adaptive Bitrate MPEG DASH Live (on the client-only for that initial release). This … Continue reading

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Deploying the CyberFlood Controller on ESXi (6)


CyberFlood is Spirent’s next-generation GUI for Security and Performance Testing. If you need to test a Firewall, Next-Gen (NGFW) or not, this is the tool you need. The Controller is a Virtual Machine that you deploy and that allows you … Continue reading

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Cipher Suite Names


Probably because everything needs to be complicated in cryptography, OpenSSL (and compatible APIs and products) have two sets of Cipher Suite names : Long-Name Format and Short-Name Format. Another way to look at it is that long form names are … Continue reading

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Pi-Hole is a wonderful DNS server (and much more)


I was recently made aware of a nifty project called Pi-Hole. Besides having one of the best project name ever, it’s just a brilliant idea. What PH does is black hole Fully-Qualified Domain Names (FQDN) known for serving advertisement but … Continue reading

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IPSEC Remote Access Testing using Avalanche and Fortigate – The Sequel


A few years ago I wrote an article on how to test IPSEC on a Fortigate using Avalanche. But the article is largely outdated and only covers Preshared Key Authentication. It so happens that I recently needed to configure a … Continue reading

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restic is probably the best backup solution for nerds


Backup (and Backup┬áManagement) is a Big Deal and should not be taken lightly. There are many paid-for solution of various qualities. There are also various backup strategies. I won’t cover those but I’ll just say that you should have both … Continue reading

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Harhar is now open source!


Harhar uses several open source libraries (JSON.NET, NodaTime and HarNet) and was provided for free (as in “free beer”). I have uploaded the Harhar source code on Github so it is now a free (as in “free speech”) and open … Continue reading

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