This is the blog of Ronald Bartels that wanders on and off the subject of problem management (that is how it started). Mostly now the topics are about IoT and SD-WAN.
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Great paper on failure of complex systems
It is not often you read something that completely changes the way you look at IT. This paper How Complex Systems Fail
rocked me. Reading this made me completely rethink ITSM, especially
Root Cause Analysis, Major Incident Reviews, and Change Management. It dates from 1998!!. Richard Cook is a
doctor, an MD. He seemingly knocked this paper off on his own, it is a
whole four pages long, and he wrote it with medical systems in mind.
But that doesn't matter: it is deeply profound in its insight into any
complex system and it applies head-on to our delivery and support of IT
services.
Firewalls are becoming increasingly important in today’s world. Hackers and automated scripts are constantly trying to invade your system and use it for Bitcoin mining, botnets or other things. To prevent these attacks, you can use a firewall on your system. IPTables is the strongest firewall in Linux because it can filter packets in the kernel before they reach the application. Using IPTables is not very easy for Linux beginners. We have created easywall - the simple IPTables web interface . The focus of the software is on easy installation and use. Access this neat software over on github: easywall
When building a DDoS mitigation service it’s incredibly tempting to think that the solution is scrubbing centers or scrubbing servers. I, too, thought that was a good idea in the beginning, but experience has shown that there are serious pitfalls to this approach. Read the post of at Cloudflare's blog: N o Scrubs: The Architecture That Made Unmetered Mitigation Possible
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