A10 Networks Thunder SSLi Overview

A10 Networks Thunder SSLi is the #1 ranked solution in our list of top SSL/TLS Decryption tools. It is most often compared to F5 BIG-IP: A10 Networks Thunder SSLi vs F5 BIG-IP

What is A10 Networks Thunder SSLi?

SSL encrypted traffic is growing, rendering most security devices ineffective.
Gain visibility into encrypted traffic with SSL Insight and stop potential threats.

A10 Networks Thunder SSLi is also known as Thunder SSLi.

A10 Networks Thunder SSLi Buyer's Guide

Download the A10 Networks Thunder SSLi Buyer's Guide including reviews and more. Updated: January 2021

A10 Networks Thunder SSLi Customers

Klein Independent School District

A10 Networks Thunder SSLi Video

Pricing Advice

What users are saying about A10 Networks Thunder SSLi pricing:
  • "We always pay for support. Any organization of our size who doesn't is asking for problems."
  • "When you purchase the equipment, you purchase the licensing and warranty. It's all fairly standard. We haven't been caught with anything surprising."
  • "Our licensing costs, yearly, are just under $15,000. Your initial cost of acquisition is obviously going to be more than $15,000..."

A10 Networks Thunder SSLi Reviews

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Chris Cummings
Director of Information Technology at Klein Independent School District
Real User
Top 20Leaderboard
Aug 27, 2019
The SSL decryption successfully decrypts at a rate that has minimal to no impact on our end users

What is our primary use case?

* SSL encryption * SSL decryption * Traffic inspection * Content inspection We also have the Thunder SSLi Harmony Controller, which is used for encrypted attacks and inspecting encrypted traffic. Our primary mission is to ensure students are safe. This is a key component in making sure the safety of our students, client family, and the people who work within our district's boundaries. We use the most up-to-date version, as we keep our firmware updated. We are using its on-premise hardware.

Pros and Cons

  • "With the Thunder SSLi, we're better protected. We can stop use of VPN and proxies. We are better protected against dirty traffic coming back to our schools. Having a secure decrypt zone with the equipment lowers the chances that our security infrastructure could possibly miss an attack."
  • "I would like them to have a better UI (better universal design)."

What other advice do I have?

Before you go with any product, especially when it comes to security and the ability to shore up initiatives, sit down and do a gap analysis. Understand the environment before moving forward. Sometimes, we become very reactionary and need to fill the gaps. We find an appliance that will fit the gap immediately, and then we're left eight years down the road trying to build upon that solution. My advice is make sure to understand your current needs, project your future needs in an efficient way, and that they are grounded in the actual data. That is what we did, partnered with our integrator and…
Kenneth Murray
Data Center Network Engineer at Bridgeton Board of Education and Public Schools
Real User
Top 5Leaderboard
Jan 20, 2020
Enables our content filter to do its job without any noticeable delay

What is our primary use case?

The world of internet traffic is ever-changing. More and more companies are increasing security for their clients, which is counterproductive to what this appliance is supposed to be doing. The devices in question, the Thunder SSLi's, are decryption appliances, among other things. They do things other than decryption but what we bought them for was decryption. They sit in-line in the network, in the middle of the traffic, between servers and the clients, and they decrypt the encrypted traffic and send it to a specific location for processing. The traffic is then sent back and re-encrypted… more »

Pros and Cons

  • "Its most valuable feature is its ability to do its job accurately, effectively, and very quickly. The amount of traffic that we have going through our system is astounding... The delay with the SSL decryption turned on is almost unnoticeable."
  • "There is one thing I would like to see changed. In their features for setting things up, there is a templating system that would normally assist clients. However, we had a better time setting up the device either through the command line or through the interface and not using the templates that were pre-installed. So there is room for improvement to the templates for initial installation."

What other advice do I have?

My advice is to rely on the tech support. They're there to help and they will not abandon you. Their engineering team is very good at what it does. They're definitely going to work out — in their own environment — any issues you may have during your installation, and will find a solution and help you implement that solution, so that you're not left with a very expensive paperweight. The biggest lesson I have learned from using SSLi is that the internet is still changing. It is getting more secure, relatively speaking, and from an administrator's standpoint, because it's getting more secure…
Learn what your peers think about A10 Networks Thunder SSLi. Get advice and tips from experienced pros sharing their opinions. Updated: January 2021.
454,950 professionals have used our research since 2012.
Enterprise Security Manager at a mining and metals company with 5,001-10,000 employees
Real User
Nov 28, 2019
We used to have to bypass on the firewall, proxy, and IPS; now we can do it in one place

What is our primary use case?

We're using it for our SSL operation. A10 has a "sandwich model." There are two boxes, one of them is on our internal network and the other one is on our external network which is just in front of the internet router. The first box decrypts SSL traffic, HTTPS traffic, and the other box, in front of the router, encrypts again. Between these two boxes, all the HTTPS traffic is clear text, and all the devices between the two A10 devices see all the clear text which means they can intercept all the traps or all the applications. We have a firewall, proxies, IPS, and some network deep-packet… more »

Pros and Cons

  • "We have several proxies in our environment, so we localized internet traffic between these proxies. Instead of getting a really huge proxy box, according to our size, we can use three boxes and share the traffic with A10's load-balancer feature."
  • "It would be great if it supported SSL operations according to Active Directory users. For example, if we want to bypass one of the servers or a client's internet access for SSL interception, we have to do it according to the IP address. It would be better if we could do it according to the Active Directory username. A10 says they kind of support that but we haven't tested it."

What other advice do I have?

For SSL operations, if you need to intercept traffic and cover all your security network devices, it is better to use A10. It can support all SAN boxes, proxies, net devices, and all IPS devices. If you need traffic load-balancing between security devices - proxies, firewalls - A10 has a really good and a strong local-answer feature. It's good for that as well. SSLi is a very powerful device. It has many features and to get them configured is kind of tough. I cannot say it is easy to use, but I can say that is was successful in accomplishing our project. We don't use the solution's visibility…