FortiOS's most valuable feature is a next-generation firewall that can be used as the APT solution in advanced threat protection. The IPS feature is also very good and can sometimes detect threats that are not detectable by the Palo Alto firewall.
Junior Manager at a financial services firm with 501-1,000 employees
Next-generation firewall that can detect threats other solutions do not
Pros and Cons
- "FortiOS's most valuable feature is a next-generation firewall that can be used as the APT solution in advanced threat protection."
- "The threat time interval lags a little, especially if there's a heavy load on the firewall."
What is most valuable?
What needs improvement?
The threat time interval lags a little, especially if there's a heavy load on the firewall.
For how long have I used the solution?
I've been working with FortiOS for over four years.
What do I think about the stability of the solution?
FortiOS is one of the most stable solutions.
Buyer's Guide
Fortinet FortiOS
January 2026
Learn what your peers think about Fortinet FortiOS. Get advice and tips from experienced pros sharing their opinions. Updated: January 2026.
881,114 professionals have used our research since 2012.
What do I think about the scalability of the solution?
FortiOS is very easy to scale.
How are customer service and support?
Fortinet's technical support is good.
How was the initial setup?
The initial setup was easy and could be done without an integrator or other external assistance.
What other advice do I have?
Compared to other firewalls like Palo Alto, FortiOS is easy to deploy and upgrade - for example, an upgrade of Palo Alto takes at least thirty minutes, but Fortigate can be done in around ten. I would rate FortiOS eight out of ten.
Which deployment model are you using for this solution?
On-premises
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Consultant at a tech services company with 10,001+ employees
Reliable, low maintenance, and installation simple
Pros and Cons
- "I have found the most valuable feature of Fortinet FortiOS is the low maintenance."
- "The central management can improve in Fortinet FortiOS. It is sometimes difficult to manage all the devices."
What is our primary use case?
Fortinet FortiOS provides a full UTM experience, including UTM profiles, firewall rules, remote access, VPN connection, IPSec, and SSL connection.
What is most valuable?
I have found the most valuable feature of Fortinet FortiOS is the low maintenance.
What needs improvement?
The central management can improve in Fortinet FortiOS. It is sometimes difficult to manage all the devices.
I wrote my opinion about changes to the SSL-VPN authentication directly on the Fortinet forum, and they said that right now they will not change it. Hopefully, in the future, they will change the SSL-VPN authentication for groups and users.
For how long have I used the solution?
I have been using Fortinet FortiOS for approximately five years.
What do I think about the stability of the solution?
The stability of Fortinet FortiOS depends on the operation being done. If we are using the basic functions I would rate the stability of Fortinet FortiOS a five out of five. If we are using the advanced functionality I would rate the stability a three out of five. Overall the solution is stable.
How are customer service and support?
The support from Fortinet FortiOS is good. However, there are times they give a five out of five level of support and whereas other times they give a one out of five.
How was the initial setup?
Fortinet FortiOS's installation is easy.
What's my experience with pricing, setup cost, and licensing?
The scalability of Fortinet FortiOS is good. However, central management is intuitive for the end-users. We had a lot of questions about central management, and sometimes they didn't use it and did their firewall management directly on FortiGate instead of using Fortinet FortiOS.
What other advice do I have?
My advice to others is for them to read the instructions on how to use the solution.
I rate Fortinet FortiOS a nine out of ten.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Buyer's Guide
Fortinet FortiOS
January 2026
Learn what your peers think about Fortinet FortiOS. Get advice and tips from experienced pros sharing their opinions. Updated: January 2026.
881,114 professionals have used our research since 2012.
Assistant Manager at a tech services company with 1,001-5,000 employees
Good security and reliability with helpful support
Pros and Cons
- "We found the initial setup to be straightforward."
- "Right now, we have to contend with CLI. We'd like it to be easier. We need the features to be in a UI."
What is our primary use case?
We are using it for security purposes.
What is most valuable?
The security on offer is good.
It's quite stable.
The scalability has been great.
We found the initial setup to be straightforward.
Technical support has been good overall.
What needs improvement?
The UI could be a bit better. The coming generation will not be from the Sierra, and therefore they have a chance to make it much better and more user-friendly. Right now, we have to contend with CLI. We'd like it to be easier. We need the features to be in a UI.
For how long have I used the solution?
I've been using the solution for more than five years.
What do I think about the stability of the solution?
The solution has proven to be stable and reliable. The performance is good. There are no bugs or glitches. It doesn't crash or freeze.
What do I think about the scalability of the solution?
We find the solution to be quite scalable. If you need to expand it, you can do so.
We have more than 5,000 people on the solution right now.
How are customer service and support?
Technical support has been good in general. They are helpful and responsive. I have no complaints in regard to their level of service.
How would you rate customer service and support?
Positive
How was the initial setup?
It offers a pretty simple and straightforward setup. I'd rate it four out of five in terms of ease of implementation. It's not something that's too complex or difficult.
What's my experience with pricing, setup cost, and licensing?
I don't have many details surrounding the licensing. It's not an aspect I directly deal with. My understanding is the solution is moderately priced.
What other advice do I have?
We are Fortinet partners.
If a company is looking for a local security enhancement, we tend to recommend or select this kind of solution.
I'd rate the product nine out of ten overall.
Disclosure: My company has a business relationship with this vendor other than being a customer. Partner
Security Operations Center Team Leader at a tech vendor with 10,001+ employees
A feature-heavy solution that allows tweaks through the CLI
Pros and Cons
- "The solution constantly adds features that are useful and user-friendly such as the ability to tweak firewalls through the CLI."
- "The solution's graphic interface could be a bit more responsive and include notations when changes are made."
What is our primary use case?
Our company is a partner and we install the solution for our customers as a firewall for remote VPN use.
We also use the solution to protect our own company that includes more than 1,000 users.
What is most valuable?
The solution constantly adds features that are useful and user-friendly such as the ability to tweak firewalls through the CLI.
What needs improvement?
The solution's graphic interface could be a bit more responsive and include notations when changes are made
For how long have I used the solution?
I have been using the solution for seven years.
What do I think about the stability of the solution?
The solution is stable. In seven years of use, I've only encountered two or three occasions where a bug affected the firewall's behavior.
I rate stability an eight out of ten.
What do I think about the scalability of the solution?
The solution is very scalable and it is quite easy to add users.
I rate scalability a ten out of ten.
How are customer service and support?
Technical support has issues with knowledge base at the first tier. It sometimes takes hours of explanation before support fully understands and can troubleshoot or escalate problems.
Response time could also be improved.
I rate support a six out of ten.
How would you rate customer service and support?
Neutral
Which solution did I use previously and why did I switch?
Our company has always used the solution and is not interested in other products.
How was the initial setup?
The initial setup is easy, it only requires one engineer, and the main interface is self-explanatory.
Users who are familiar with the solution can always dig further in the CLI to change the properties.
What about the implementation team?
We deploy the solution for our company and our customers.
One engineer spends about two days configuring, testing, and deploying.
What other advice do I have?
The solution is easy to configure and has good performance.
Anytime I have thought of a possible feature I'd like added to the solution, it seems the developers are on the same page and it is available within a few months.
I rate the solution a nine out of ten.
Which deployment model are you using for this solution?
On-premises
Disclosure: My company has a business relationship with this vendor other than being a customer. Partner
Manager at a tech services company with 51-200 employees
Great SD-WAN, IPS, and application control
Pros and Cons
- "It's very easy to use."
- "They need to integrate more with the SD-WAN."
What is most valuable?
It's very easy to use.
The SD-WAN, IPS, application control and web features are all very valuable aspects of the solution.
What needs improvement?
We haven't had any issues with the solution. It's been pretty good in general.
We would like to see the ability to maybe monitor applications that use the SD-WAN. They need to integrate more with the SD-WAN.
We would like to see lower pricing. The price is high.
For how long have I used the solution?
I've used the solution for a long time. It's been maybe ten years.
What do I think about the scalability of the solution?
We have about 100 users on the solution.
Which solution did I use previously and why did I switch?
I've also worked with Check Point.
What's my experience with pricing, setup cost, and licensing?
We have three years' worth of licensing before we have to renew anything. We renewed it about two years ago. The pricing could be a bit better.
What other advice do I have?
I'm a customer and an end-user.
I'd rate the solution nine out of ten. It has worked well for us overall, and we are happy with its capabilities.
Which deployment model are you using for this solution?
On-premises
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
IT Manager at a tech vendor with 10,001+ employees
Great for data protection and good customer service and support
Pros and Cons
- "The stability of Fortinet FortiOS is great."
- "The product needs a feature that allows users to create another site on a VPN."
What is our primary use case?
The solution is great for data protection in our company, including site too site and SSH.
What is most valuable?
The stability of Fortinet FortiOS is great.
What needs improvement?
The product needs a feature that allows users to create another site on a VPN.
For how long have I used the solution?
We have used this solution with our clients for two years and are currently using version 11. Additionally, we deploy this solution on-premises.
What do I think about the stability of the solution?
The solution is stable.
What do I think about the scalability of the solution?
The solution is scalable. We have a large number of clients using this solution with their users.
How are customer service and support?
We have had a good experience with customer service and support. They are very fast.
How was the initial setup?
The initial setup was very easy to configure.
What about the implementation team?
We implemented it through our in-house technical team.
What other advice do I have?
I rate this solution a nine out of ten. The solution is very good but needs a feature that allows users to create another site on a VPN.
Which deployment model are you using for this solution?
On-premises
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Network Support at a pharma/biotech company with 1,001-5,000 employees
Flexible, easy to use, and meets our requirements
Pros and Cons
- "It's easy to use."
- "Right now, all the features meet my requirements."
What is our primary use case?
FortiOS is just an operating system. That's it. It's a firmware FortiGate is running.
FortiOS is the foundation of the Fortinet secured fabric.
How has it helped my organization?
You can have virtual domains. On top of each virtual domain, you can see the independent system. When comparing Fortinet with other vendors, the good part is you can set different priorities. It depends on different VDOMs. In my case, I have two VDOMs. One is called a VPN VDOM; the other is called a web filter VDOM. Usually, for other vendors, no matter how many domains, just one primary device is always a primary one. However, for FortiGate, you can separate them. In my case, I have machine one, and machine two. FortiGate one, Fortigate two. And for each FortiGate, we can have multiple VDOMs. In my case, I have two VDOMs. If you want to save money, you can split the workload, and this capability helps us save on costs.
What is most valuable?
It's very flexible firmware.
I really like it overall. It really meets lots of my requirements.
The initial setup is easy.
It's easy to use.
The solution is quite stable.
What needs improvement?
Right now, all the features meet my requirements. It's not lacking in any way.
For how long have I used the solution?
I have more than ten years of experience with the solution.
What do I think about the stability of the solution?
The stability is good. There are no bugs or glitches. It doesn't crash or freeze. It is reliable. In terms of hardware. We are in a cycle right now to handle hardware replacement. We've been using the hardware for seven years now.
What do I think about the scalability of the solution?
I have more than 400 stores nationally in Canada. I have it in every different location. For each store, for business continuity purposes, we have two internet connections. One is the primary internet connection; the secondary is the LTE.
LTE is expensive, so we always use the primary, like cable or PPPoE. Unless the cable or PPPoE fails, then we switch traffic to LTE. Even for LTE, we control the traffic. For example, we have backup traffic. For LTE, we don't allow the backup traffic to go through LTE since LTE is for business continuity purposes only.
For redundancy, you build up the HA environment, meaning, at a minimum, you have two devices to work together. The secondary is always just sleeping there, dormant. When the primary fails, then you switch over to secondary.
However, for Fortinet, on top of this, you can have multiple VDOMs.
How are customer service and support?
I'm a very senior tech guy, and therefore I would rarely need their services. However, I will say they have been much better, and we find them helpful.
Which solution did I use previously and why did I switch?
I've had previous experience with Cisco products.
How was the initial setup?
The initial setup is very good. I'm a Cisco guy; I'm used to the command line interface. Therefore, right now, from my command line point of view, I like it. The hierarchy of the command line is very clear and it's very easy to change as needed.
What's my experience with pricing, setup cost, and licensing?
The license is based on the machine itself, not on how many users. That's why we backhaul all the internet traffic to my head office, so in my head office, I only need to buy one license. To access the internet, we have a VPN tunnel.
I'm not sure of the exact costs. I didn't purchase it, I just use it.
Which other solutions did I evaluate?
I've compared the solution to Palo Alto and Cisco.
What other advice do I have?
Right now, more and more services are moving to the cloud. In terms of the cloud, the IP address changes so frequently. Today you see this IP for this service, the next day, without notifications, they may change IP to other IP addresses. So, originally, all firewall rules were based on the IP address. Now, it's not based on the IP address; it's based on the service. I can see Fortinet has already worked on this. For example, they provide internet service, which I remember, even though I haven't tried it yet. There's an internet service called Office 365. You just use this; you don't need to know the exact IP address or something; you just use this name. In the background, Fortinet updates this, updates all the information about this group, so you don't need to. The firewall keeps retrieving all that information from Fortinet, so you don't have to worry about the frequent change on the cloud side.
So far, I'm very satisfied with this device. Compared with other vendors, like Palo Alto and Cisco, I'm delighted with FortiGate, to be honest.
I'd rate it ten out of ten.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Network & System Administrator at a insurance company with 51-200 employees
User-friendly, simple configuration, and knowledge support
Pros and Cons
- "The most valuable features of Fortinet FortiOS are user-friendliness, ease of use, and threat prevention."
- "We had assistance from one person from our local vendor for the implementation."
What is our primary use case?
I use Fortinet FortiOS for firewalls.
What is most valuable?
The most valuable features of Fortinet FortiOS are user-friendliness, ease of use, and threat prevention.
For how long have I used the solution?
I have been using Fortinet FortiOS for approximately two years.
What do I think about the stability of the solution?
Fortinet FortiOS is stable.
What do I think about the scalability of the solution?
We have approximately 100 users using Fortinet FortiOS. All levels of employees are using the solution.
How are customer service and support?
The support from Fortinet FortiOS has been good. They had the knowledge and professionalism.
Which solution did I use previously and why did I switch?
We were using Juniper before we choose Fortinet FortiOS.
How was the initial setup?
The initial setup of Fortinet FortiOS was very easy. The configuration was simple to do. The whole implementation took approximately two weeks.
What about the implementation team?
We had assistance from one person from our local vendor for the implementation.
What other advice do I have?
Fortinet FortiOS is very effective and easy to use to configure. I would recommend it to others.
I rate Fortinet FortiOS a ten out of ten.
Which deployment model are you using for this solution?
On-premises
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Buyer's Guide
Download our free Fortinet FortiOS Report and get advice and tips from experienced pros
sharing their opinions.
Updated: January 2026
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