Cloud & Networking
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You're reading from  OPNsense Beginner to Professional

Product typeBook
Published inJun 2022
PublisherPackt
ISBN-139781801816878
Edition1st Edition
Concepts
Network Security
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Author (1)
Julio Cesar Bueno de Camargo
Julio Cesar Bueno de Camargo
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Julio Cesar Bueno de Camargo

Julio Cesar Camargo is a cybersecurity professional with +15 years of experience working with open-source software. He started with Conectiva Linux and later became the official instructor helping dozens of students. As an aviation enthusiast and airplane pilot, he strives to bring all the aviation best practices to his professional routine. Julio started working with OPNsense in 2016, contributing to the project with code, official forum moderation, articles, Udemy course, and promotions in Europe. He founded Cloudfence in 2018, a cybersecurity startup and a Luso-Brazilian-managed security services firm with an open-source DNA. As its CTO, Julio aims to spread open source security as a service to companies from different parts of the world.
Read more about Julio Cesar Bueno de Camargo

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Troubleshooting

In this section, we will explore some of the common issues you may face while using an I(DP)S in OPNsense and also how to solve each:

  • Poor performance while using IPS: First things first – plan your IPS deployment with care! IPS mode is a resource-consuming feature, and you will need suitable hardware with a high-clock CPU, multicores, and good network cards to get the IPS working well in a high-traffic network. The recommended pattern matcher is Hyperscan, which works well with supported CPUs (SSE3-capable). A long list of enabled rulesets will demand a lot of RAM if you wish to inspect traffic without issues. A common symptom of this issue is high CPU usage and low bandwidth, especially from WAN, while using IPS mode. If your hardware isn't working reasonably with IPS mode on, it might be good to keep it only in IDS mode, which will consume fewer resources.
  • A lot of false positives: A good deployment plan will avoid this kind of situation....
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OPNsense Beginner to Professional
Published in: Jun 2022Publisher: PacktISBN-13: 9781801816878
© 2022 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Julio Cesar Bueno de Camargo

Julio Cesar Camargo is a cybersecurity professional with +15 years of experience working with open-source software. He started with Conectiva Linux and later became the official instructor helping dozens of students. As an aviation enthusiast and airplane pilot, he strives to bring all the aviation best practices to his professional routine. Julio started working with OPNsense in 2016, contributing to the project with code, official forum moderation, articles, Udemy course, and promotions in Europe. He founded Cloudfence in 2018, a cybersecurity startup and a Luso-Brazilian-managed security services firm with an open-source DNA. As its CTO, Julio aims to spread open source security as a service to companies from different parts of the world.
Read more about Julio Cesar Bueno de Camargo

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