The Barracuda Load Balancer ADC is a Secure Application Delivery Controller that enables Application Availability, Acceleration and Control, while providing Application Security Capabilities.
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NetScaler
Score 8.7 out of 10
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NetScaler ADC is an application delivery controller.
For an important high availability website such as for email, this is a great solution. However, it does in a way, create it's own single point of failure in that if it goes down all the web servers it services are no longer available but there are ways around that rather than just spending more on a secondary unit. There are probably less expensive units or DNS methods you could use for less critical web sites you are trying to maintain. But for exchange and multiple website support with excellent reliability and support, this is a good solution.
Citrix NetScaler is suited to any environment where hardware load-balancing, application delivery or SSL offloading is a requirement. It's a product that can be used to manipulate traffic flows in a multitude of different ways and its only limit is the protocol, application and imagination of the administrator. It's not a product that includes helpful wizards to guide the admin through each process gracefully. While it is a fairly intuitive product to use, it's not for someone who is not initiated into the ways of networking and network protocols and communication. Nor is this a product that would lend itself solely for the usage of single usage scenarios where small traffic flows would be expected (although if desired the VPX product would probably suffice in that specific scenario depending on the environment)
The configuration settings are relatively granular, but instructions often only list the necessary fields, so if you need some custom settings it can be a little hunt and find what you need.
Their support knowledge base page has instructions, but it can be difficult to navigate. There are different versions for different generations of both the barracuda devices and also the connecting software. (looking for setting up the Microsoft Exchange Load balancing can get you different instructions for each level of load balancer and also each version of Exchange).
The internal logging review screens and settings can take a while to get used to how it is structured. It can also take a few tries to configure the service logging to get the type of information you'd like.
I gave the NetScaler a 7 here because the system once configured and deployed is very easy to use. However, if you did not deploy the system and do not have the fundamental background knowledge then you will have trouble using the product in general. Overall it is a great product and service but does typically require professional services to be deployed.
Barracuda, in general, has very responsive and high-quality support. It's fantastic to be able to get someone on the phone quickly when you need help or a fast call back. With instant replacement, you can feel assured that in the case of a complete failure, you will have a new unit with configuration intact within a day or two. One of the best for support in my experience.
Overall, our organization's experience with Citrix support is that support can be hit or miss. Oftentimes it takes multiple attempts and much longer than desirable to obtain a viable solution for issues experienced with their products. It would be great to see Citrix invest time, effort, and almighty dollars into improving their support and bug fix process across the board.
We also had looked at Kemp and F5. The Kemp and F5 had a lot of horsepower and advanced configuration and functionality. When we looked at our workload and how we were planning on using the load balancers, we really didn't need all those extra bells and whistles. Barracuda provided all the standard functionality we needed and were looking for and did so at a greatly reduced price point.
Netscaler has more features than F5 BIG-IP APM product and easier to manage with friendlier user interface for network admins. It was more cost efficient as well and if you have a Citrix XenApp and XenDesktop environment, it is more compatible with those products as well. Our annual maintenance cost is lower as well.
It was a prerequisite for moving to Microsoft Exchange 2016, which requires a load balancer solution as part of the design. So, it allowed us to move forward with that upgrade. Having it to load balance VDI sessions is a bonus.
