Visualizing AS32934 (Facebook) BGP Outage
A lot has already been said about the 6-hour Facebook outage of 4th October 2021. Instead, I will take a different approach; visualizing it.
Cloudflare Hijacked my Ghost(Pro) Domain
Cloudflare will gladly delegate any of your domains that are pointing to any SaaS provider hosted on their platform. In this article I show how to take back control
Analyzing Data from a Public-Facing Honeypot
What happens if you setup a badly password protected server on the public internet without telling no one? How much time would it take before a botnet would try to hijack it?
Bypassing Active Directory Group Policy
Networks that run with users as local administrators have no way to enforce policies on their organization's computers. In this post, I show how and why.
Never accept an MDM policy on your personal phone
With BYOD, companies are more than ever keen on protecting their data. MDM tools, like Google Apps, do more than that; they invade your privacy.
Linux Essentials - From Starter to Beginner
Open source slides (licensed under the CC BY-SA 4.0 License) for my Linux Knowledge Sharing session which explores Linux History and some basic commands.
What is a Leap Second and why is it worth your time?
Leap Seconds. A new one is being injected at the end of 2016. Why should you care? Is your infrastructure and software prepared for the issues it brings with it?
Why can't you have a CNAME at the root of a domain?
Have you ever wondered why your nameserver does not allow you to put a CNAME Record at the zone apex?
On HSTS
What is HSTS? How does it protect your web host from SSL Stripping Man In The Middle attacks? How can you implement it?
Enabling Windows' DNS Server to Validate DNSSEC
DNSSEC is a suite of specifications for securing DNS. How do you enable your Windows DNS Server to Validate DNSSEC?
Origins of the Domain Name System
DNS is a critical infrastructure component of the Internet. How did it originate? How does it work? Who controls it? Is it secure?
Beginner's Guide to IPv6
There are no longer any IPv4 addresses available for allocation from IANA. This means that adoption of IPv6 is now of paramount importance.
Beginner's Guide to Understanding BGP
BGP is one of the core protocols that drive the Internet, yet few people know what it is, yet alone how it works. In this post we scratch the surface on what BGP is and how it works.
Monitoring Redis in PRTG
It is increasingly common to see Redis being used in modern applications. Learn how to monitor a Redis cluster or standalone instance in PRTG.
Caching and Storage Tiering in Storage Spaces Direct
Windows Server 2016 Datacenter Edition introduces Storage Spaces Direct (S2D). How does Caching and Storage Tiering differ from Storage Spaces?
Monitoring RabbitMQ in PRTG
Learn how to use PRTG to monitor and alert on RabbitMQ status using the RabbitMQ Management Plugin REST API
Deep Dive: UEFI
Do you realize that BIOS has been around for more than 30 years? This 3 decade old technology is finally being replaced by UEFI. But what is UEFI and how does it work?
Time Zones (and Daylight Savings) in your Infrastructure and Applications
Most systems designed are heavily dependent on accurate time. In this blog I discuss some best practices on how to handle time zones and daylight savings in your infrastructure and applications
360° Inside Look into Google's Oregon Data Center Infrastructure
It's not the first time that Google has exhibited the insides of their data centers, but this new video offers a virtually immersive look into how their Oregon Data Center works.
Setting up PRTG to post to Slack
Do you use PRTG and Slack in your corporate environment? You have a match made in heaven. Learn how to make PRTG post to Slack using HTTP Webhooks
On Hyper-Convergence
What is Hyper-Convergence and what does it mean for our data-center and infrastructure?