Adventures in Troubleshooting: Chapter 1

To quote the late Bob Ross, “It’s hard to see things when you are too close. Take a step back and look.” When you are in the middle of those early morning troubleshooting sessions, it can be easy to panic. First, you are dealing with being woken up abruptly; everything is fuzzy. Then the person on the other end of the line might not be able to explain exactly what is happening. This combination usually leads to some fun times, sarcastically speaking. The best advice is to take that step back and look at the overall picture. No matter what your troubleshooting approach might be, the goal is to have one. The worst thing you can do is aimlessly wander around hoping to bump into the solution. In this entry I will dig into my mental ticket system of random issues I’ve ran into over the years, pull out three, and cover how those issues were resolved. Continue reading “Adventures in Troubleshooting: Chapter 1”

The Occasion for Segmentation

Today’s networks have security and visibility requirements that can warrant complicated designs. A proper routing design takes time. Implementing security takes some thought. Having a properly segmented network goes beyond tossing a bunch of VLANs on a switch. One of the goals in a segmentation design is to engage the business and find out the who, what, where and why of communication in the network. If you know those business purposes, you can design around it. You can implement routing and firewall rules to control who or what has access to certain assets. In this entry to the blog, I have implemented a basic segmented network using EVE-NG. Let’s take a tour! Continue reading “The Occasion for Segmentation”

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