June 2013
Intermediate to advanced
1018 pages
28h 48m
English
Content preview from Juniper SRX SeriesBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Chapter 11. Screens and Flow Options
Screen technology is one of the most powerful yet extremely misunderstood features that is part of the SRX, and it has been around since the NetScreen days. As an engineer who has seen countless deployments, many implementations of Screens are not properly tuned or understood by customers. With all of the advanced Layer 7 threats present in modern-day networking, it is very easy to overlook Layer 3 and Layer 4 threats. The truth is that although the main source of Internet threats has shifted to Layer 7 over the past decade, Layer 3 and 4 threats are still every bit as pertinent and potent, especially if you do not have adequate defenses against them.
At this point you might be asking yourself, what exactly are Screens? A Screen is a Layer 3 or Layer 4 IPS setting that can be used to detect and block various anomalies and set certain thresholds for activities at those layers. They are effective at blocking such Layer 3 and Layer 4 DoS attacks that are still perpetrated every day with great effectiveness. Examining the headlines over the last few years regarding well-known hacking, political, cybercrime, and military organizations, you will discover numerous instances of Layer 3 and Layer 4 DoS attacks that are extremely effective, in addition to those that take place at Layer 7.
In this chapter, we are going to dissect the Screen technology piece by piece. We explore how the different Screens function, where they are implemented, how they should ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.