Category Archives: Tech

Myth or reality: Fortinet has more vulnerabilities than Palo Alto and Checkpoint

Vulnerabilities in Fortinet products have been frequent, and based on sheer numbers it’s easy to condemn Forti-OS buggy insecure crappy piece of software. Palo Alto had its moment in the spotlight too when struggling with a new zero-day critical vulnerability. I was curious to find out if Fortinet is really so much worse than competitors,ContinueContinue reading “Myth or reality: Fortinet has more vulnerabilities than Palo Alto and Checkpoint”

My Juniper Story

I got inspired by Jeff McLaughlin’s post of his thoughts on Juniper, and I wanted to tell my personal Juniper story from a distant small country Finland. This is also my professional growth story and I feel Juniper has had a significant impact on it. My first contact with Juniper was around 2008 when I startedContinueContinue reading “My Juniper Story”

Thoughts on AZ-700 exam

Last week I passed Azure AZ-700 networking exam “Designing and Implementing Microsoft Azure Networking Solutions” and earned the ”Azure Network Engineer Associate” certification. My score was just above the passing level, which was 700 points, so I was very glad to make it through. The exam felt unpleasant in several ways and I want toContinueContinue reading “Thoughts on AZ-700 exam”

ACI Rant #3 Topology and scalability issues.

This microblog was released in Twitter thread. Cisco ACI feels so robust, complex and pricey that you might think it’s for big networks. Actually, there are many scalability limitations that you might encounter sooner or later. Mode: First there is a decision between Multi-pod and Multi-site. Multi-pod is single distributed fabric and easier to understand.ContinueContinue reading “ACI Rant #3 Topology and scalability issues.”

Experimenting Cumulus Linux

This post was originally posted as Twitter thread 4.3.2021. https://twitter.com/AnttiLeimio/status/1367469583007899648 Last few weeks I’ve tried to dive into Cumulus Linux and test how it is configured and operated. The goal is to make a tutorial for Cisco network engineers. Here’s a thread what I’ve noticed during my experimentation. There used to be over 130 differentContinueContinue reading “Experimenting Cumulus Linux”

Cisco ACI day 2: Real life design and operational issues

This post was originally posted as Twitter thread 15.12.2020 https://twitter.com/AnttiLeimio/status/1338764464510918658 ACI journey continues. Now I’m involved in real life practical designs and hands-on deployments. Thoughts on design and issues I have experienced. Resource objects are still hard to understand properly. Why this and that, why so many pieces? What is the best combination of vlanContinueContinue reading “Cisco ACI day 2: Real life design and operational issues”

Cisco ACI first impressions

This post was originally posted as Twitter thread 28.10.2020. https://twitter.com/AnttiLeimio/status/1321352258261536770 I took a 5 days Cisco DCACI course. This is all new to me. I’m confused. Who is ACI for? Capabilities and completeness of features are fantastic but how to manage this complex system? Everything is based on objects. I thought Junos is policy heavyContinueContinue reading “Cisco ACI first impressions”