After years of the same-old webpage template, we have updated and refined our look. I may be biased...
Once again, the world is witnessing the destructive power of a natural disaster. This time, the name is Dorian. What worries us is the fact that wind speeds reached the maximum intensity of five on the Saffir-Simpson scale, causing unprecedented damage to islands of the Bahamas. Of further concern is the fact that some Caribbean countries still have not fully recovered from 2017 storms, Irma and Maria. According to forecasts more storms can be expected as we are in the middle of the hurricane season.
The Caribbean remains vulnerable to natural disasters and this has a huge impact on the social and economic development of the region. According to Professor Jamal Saghir, former World Bank executive, and other experts, 20 percent of the Caribbean GDP is spent on natural disaster recovery. You must realize that we are talking about Small Islands Developing States (SIDS) that are already prone to all kinds of challenges due to their small economies.
Natural disasters are not going away and we can even expect them to have greater destructive power in the future. Although we cannot fight against nature, doing nothing is not an option.
At the Internet Society we work for an Continue reading
Imagine you would have a system that would read network device configurations, figure out how those devices might be connected, reverse-engineer the network topology, and be able to answer questions like “what would happen if this link fails” or “do I have fully-redundant network” or even “how will this configuration change impact my network”. Welcome to Batfish.
Interested? You’ll find more in Episode 104 of Software Gone Wild.
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AquaSec’s Daniel Sagi recently authored a blog post about DNS spoofing in Kubernetes. TLDR is that if you use default networking in Kubernetes you might be vulnerable to ARP spoofing which can allow pods to spoof (impersonate) the IP addresses of other pods. Since so much traffic is dialed via domain names rather than IPs, spoofing DNS can allow you to redirect lots of traffic inside the cluster for nefarious purposes.
So this is bad, right? Fortunately, Calico already prevents ARP spoofing out of the box. Furthermore, Calico’s design prevents other classes of spoofing attacks. In this post we’ll discuss how Calico keeps you safe from IP address spoofing, and how to go above and beyond for extra security.
ARP spoofing is an attack that allows a malicious pod or network endpoint to receive IP traffic that isn’t meant for it. Sagi’s post already describes this well, so I won’t repeat the details here. An important thing to note, however, is that ARP spoofing only works if the malicious entity and the target share the same layer 2 segment (e.g. have direct Ethernet connectivity). In Calico, the network is fully routed at layer 3, meaning that Continue reading
Fast Reroute , Fast Convergence , WRED and WFQ. You may think that why Orhan is putting all these mechanisms together. I will give you an analogy. Those who participate my talks., know that I love using analogies. Before we try to understand how these mechanisms are related with each other, let me explain what …
Continue reading "Fast Reroute, Fast Convergence, WRED and WFQ"
The post Fast Reroute, Fast Convergence, WRED and WFQ appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
best known as one of the inventors of Random Early Detection
The post Sally Floyd, Who Helped Things Run Smoothly Online, Dies at 69 – The New York Times appeared first on EtherealMind.
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