Palo Alto Networks K2-Series vs Zyxel Unified Security Gateway comparison

Palo Alto Networks K2-Series vs. Zyxel Unified Security Gateway

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Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:

Categories and Ranking

Fortinet FortiGate

Featured Reviews

Vasu Gala

Manager, Information Technology Operation/Presales at TechMonarch

A stable solution with an intuitive interface and quick customer service

I have been working with Fortinet FortiGate, WatchGuard, Sophos, and SonicWall. I'm not as comfortable with SonicWall because of their UI and limitations. I prefer Fortinet above all other options. When it comes to configuration, I am confident in my ability to handle various tasks, including creating policies such as firewall rules, web policies, and application policies. Additionally, I can configure VPNs and implement load balancing, among other tasks. Overall, I feel much more comfortable working with Fortinet. Fortinet has made significant improvements by integrating AI with firewalls for threat analysis and prevention. In the past 2-3 years, they have launched FortiSASE and SIEM, and they also provide SOC services. Both Palo Alto and Fortinet FortiGate are excellent. While Fortinet FortiGate comes at higher prices, the functionality and support justify the cost. They promptly resolve firmware issues and inform all support providers about configuration changes.

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Krishnakumar M

enterprise architect at a tech services company with 1-10 employees

One of the best tools for the prevention of evasive threats

There is a feature called granular application controls, which I liked. Instead of relying on ports and IP addresses, they use AMP ID. This kind of solution is very good. Another valuable feature is the prevention of evasive threats, which is one of the best tools I've encountered. SSL decryption and app ID-based SSL decryption are also impressive, along with the integration with user ID. Identity-based policies ensuring only authorized users can access specific resources are excellent features. Normally, there is something called SIM or SCIM in IDA IDM, but this feature is provided on the box, which is exemplary.

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Alexander Azikov

It Manager at Diamond Braces

A robust appliance that is reasonably priced and straightforward to set up

Although manageable, the user interface is a little bit slow and could be improved. There are two user interface options available, namely the basic and the advanced. The basic UI is not very good and doesn't have a lot of features, although it is fast. The advanced UI allows me to do whatever I want, but this is where the issue of speed exists. At one of our sites, the CPU utilization was very high, and for no reason. Technical support needs to be more responsive to requests.

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Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:

Pros

"Fortinet FortiGate has positively impacted our organization by preventing hackers from accessing our network."

"FortiGate Next Generation Firewall has a very high ROI"

"The firewalls are valuable for threat prevention."

"It's a user-friendly firewall. Most of the tasks are very simple. It's simple to configure and troubleshoot this firewall."

"The web controls are what I appreciate about Fortinet FortiGate. We have extensive controls over areas where we could block external-facing IPs, external URLs. We can do geo-fencing with the firewalls, which is a good feature."

"FortiGate's SD-WAN capability is the most useful feature for us."

"Easy to implement, and it is also reliable."

"Fortigate is very scalable to serve our customers' needs. We have scaled already from fifty to more than a hundred instances of Fortinet FortiGate. Around 20 staff are required for deployment and maintenance, mostly engineers."

More Fortinet FortiGate pros

"The most valuable features are the virtualization of the firewall and the antivirus."

"The most valuable features are the intuitive user interface, ease of use, and reporting."

"The application ID on the Palo Alto Networks K2-Series is able to understand the application traffic, and WildFire is also good."

"The scalability of the product is quite high."

"We've found the solution offers us good stability."

"Palo Alto has a unique solution for DNS security, which is very good."

"The most valuable feature of Palo Alto Networks K2-Series is the performance which is above their competitors. The throughput they have delivered is good. When we used other solutions they failed the deployment when we were using different rules. They have a theory perform performance light and performance degradation. However, Palo Alto Networks K2-Series never fails in that scenario."

"Simple integrations with the domain controllers and other inventories"

More Palo Alto Networks K2-Series pros

"This is a capable appliance and the standard features work well for us."

"The solution can scale well."

"The most valuable features of the solution stem from web filtering, malware protection, and antivirus."

Cons

"Fortinet FortiGate is not a scalable solution, as they give you a number and each box comes with concurrent connections; if you need to expand, you have to change the box."

"Price, of course, can always be more competitive or better."

"The big license options have web filtering, IDS, and a lot of other things, but it's not like they are all good."

"The UTM filtering needs improvement."

"I prefer Palo Alto over Fortinet FortiGate. Its IPS engine is not better than the Palo Alto version. The monitoring tool needs improvement, and the syslog configuration needs enhancement."

"Improvements could be made when companies expand and need better equipment and more licenses."

"They can do more tests before they release new versions because I would like to be more assured. We had some experiences where they release something new and great, but some of the old features are disabled or they don't work well, which impacts the product satisfaction. The manufacturer should be able to prove that everything works or not only that it might work. This is applicable to most of the other services, software, and hardware companies. They all should work on this. We cannot trust every new release, such as a beta release, on the first day. We wait for some comments on the forums and from other companies that we know. We always wait a few weeks before we use the updated version. They should also extend the VPN client application, especially for Linux versions. Currently, it has an application for Linux devices, but it doesn't work the way we want to connect to the VPN. They use only the old connection, not the new one. They have VPN client applications for Windows and Mac, but they can add more useful features to better manage the devices and monitor the current health of each device. Such features would be helpful for our company."

"There are a lot of bugs I have found in the solution and it is difficult to upgrade. These areas need improvement."

More Fortinet FortiGate cons

"There are a lot of bugs in this solution."

"The licensing cost is a typical complaint with many clients. The solution is expensive."

"Palo Alto doesn't have extended visibility to the end point in their firewalls."

"I'd like to see more data protection on the system."

"They should implement the features that the other firewalls have."

"They could improve by providing more features in the solution."

"It would be nice if it could easily be integrated with Elasticsearch or Nagios."

"Threat prevention could use improvement. Not just in malware exploits and C2 traffic; enhancing web traffic protection would be a great upgrade."

More Palo Alto Networks K2-Series cons

"Sometimes it reboots when you least expect it, and that's the main issue."

"Although manageable, the user interface is a little bit slow and could be improved."

"The product has some scalability and data management issues where improvements are required."

Pricing and Cost Advice

"It is an expensive solution."

"The platform offers a reasonable price point compared to its competitors."

"The price is okay, so far so good."

"The tool is a bit pricey for small businesses, but it is still bearable in terms of cost."

"The product is expensive. I rate its pricing a six out of ten."

"The pricing is reasonable."

"For the price, I'd rate it a ten because it's very cost-effective."

"The licensing costs are very low."

More Fortinet FortiGate pricing and cost advice

"Palo Alto firewalls are very expensive."

"If you compare K2-Series' quality with its price, I think it is reasonable."

"It would be nice if they lowered their prices for small businesses."

"It is an expensive solution."

"This solution is expensive compared to other, similar products."

"When comparing Palo Alto Networks K2-Series with other solutions it is on the higher end of the price scale."

"The price of the solution is expensive."

"Pricing is a sensitive issue because the cost is high in this market."

More Palo Alto Networks K2-Series pricing and cost advice

"The price of Zyxel Unified Security Gateway is good compared to other similar products in the market."

"This gateway is pretty cheap."

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Top Industries

By visitors reading reviews

Computer Software Company

15%

Comms Service Provider

Manufacturing Company

Financial Services Firm

Performing Arts

24%

Computer Software Company

16%

Manufacturing Company

Comms Service Provider

21%

Computer Software Company

15%

Outsourcing Company

Retailer

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	350
Midsize Enterprise	130
Large Enterprise	187

By reviewers
Company Size	Count
Small Business	13
Midsize Enterprise	8
Large Enterprise	13

No data available

Questions from the Community

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When you compare these firewalls you can identify them with different features, advantages, practices and usage a...

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From my experience regarding both the Sophos and FortiGate firewalls, I personally would rather use FortiGate. I know...

What are the biggest technical differences between Sophos UTM and Fortinet FortiGate?

As a solution, Sophos UTM offers a lot of functionality, it scales well, and the stability and performance are quite ...

Features comparison between Palo Alto and Fortinet firewalls

In the best tradition of these questions, Feature-wise both are quite similar, but each has things it's better at, it...

What is your experience regarding pricing and costs for Palo Alto Networks K2-Series?

The pricing for the Palo Alto Networks K2-Series solution is affordable and there are no complaints about the licensing.

What needs improvement with Palo Alto Networks K2-Series?

The graphical user interface is a little complex and difficult to manage. L1 engineers cannot work on the Palo Alto N...

What do you like most about Zyxel Unified Security Gateway?

The most valuable features of the solution stem from web filtering, malware protection, and antivirus.

What is your experience regarding pricing and costs for Zyxel Unified Security Gateway?

I cannot definitively comment on whether Zyxel Unified Security Gateway is an affordable product as I haven't done co...

What needs improvement with Zyxel Unified Security Gateway?

The integration capability is quite challenging. The system is very complicated, and many features are hidden. I'm lo...

Sophos XG vs Fortinet FortiGate

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Compared 13% of the time

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Compared 11% of the time

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Compared 7% of the time

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Compared 6% of the time

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Compared 5% of the time

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Product Reports

Download Fortinet FortiGate product report

Fortinet FortiGate

October 2025

Palo Alto Networks K2-Series

Download Palo Alto Networks K2-Series product report

Unified Threat Management (UTM)

Download Zyxel Unified Security Gateway product report

Overview

Fortinet FortiGate excels in providing integrated VPN, firewalling, and Unified Threat Management (UTM) with centralized management and high availability. It supports remote access and comprehensive threat protection, making it a preferred choice for securing networks.

Fortinet FortiGate offers a robust security platform with features such as strong intrusion prevention, application control, and web filtering. Its integration with Active Directory and SD-WAN functionality provides scalable solutions for large networks. Users appreciate its ease of use through centralized management interfaces, ensuring robust security with flexible configurations. However, FortiGate could enhance its graphical interface and technical support responsiveness, address firmware bugs and costly licensing, improve logging, integrate better with third-party tools, and strengthen scalability and memory for log storage. Complexity in configuration and the need for intuitive features are noted challenges, and there's a demand for advanced security, zero-trust capabilities, and AI integration.

What are the key features of Fortinet FortiGate?

VPN: Secure remote access and connectivity.
Firewalling: Protects networks from unauthorized access and attacks.
UTM: Offers a comprehensive approach to threat management.
SD-WAN: Optimizes traffic routing for efficient network performance.
Web Filtering: Controls and monitors web access and ensures Internet security.

What benefits or ROI should be considered?

Centralized Management: Simplifies administration and monitoring.
High Availability: Ensures consistent security and network availability.
Scalability: Adapts to the needs of growing networks.
Comprehensive Threat Protection: Provides robust security measures.
Ease of Use: Minimizes the complexity of security management.

Fortinet FortiGate is widely implemented across industries like education, finance, and government. Companies use it for firewall protection, VPN, and SD-WAN capabilities, ensuring secure perimeter and data center security. It facilitates remote access management and traffic routing optimization, offering reliable security and connectivity solutions.

Fortinet

Designed to handle growing throughput needs due to increasing amounts of application-, user-, and device-generated data, the K2-Series offers amazing performance and threat prevention capabilities to stop advanced cyberattacks and secure mobile network infrastructure, subscribers, and services.

Palo Alto Networks

ZyWALL USG Series delivers high-access quality to help businesses satisfy the demand for always-online communications. For internal deployments, the ZyWALL USG Series provides active-passive High-Availability (HA) service to support device or connection failover.

With Device HA Pro service, the ZyWALL USG Series also supports instant failover, so connections are always maintained when a failover event occurs. For external deployments, the ZyWALL USG Series features multi- WAN load balancing/failover and a comprehensive mobile broadband USB modem support list for WAN backup operations. The ZyWALL USG Series also supports IPSec load balancing and failover, providing additional resilience for mission-critical VPN failover with VTI Interface deployments.

ZyWALL USG110/210/310 thoroughly protects networks with industry-leading firewall, Anti-Malware/ Virus, Anti-Spam, Content Filtering, IDP, and Application Patrol functionality. Regulate unauthorized use of Web applications over your network, such as Facebook, Google apps, and Netflix, among others. Zyxel security measures are enhanced with SSL Inspection, blocking threats hidden in SSL-encrypted connections while facilitating deeper policy enforcement. Furthermore, newly improved Content Filtering 2.0 enhances HTTPS Domain Filter, Browser SafeSearch, and Geo IP Blocking for an array of security enhancements to ensure clean Web connections.

Zyxel

Sample Customers

Amazon Web Services, Microsoft, IBM, Cisco, Dell, HP, Oracle, Verizon, AT&T, T-Mobile, Sprint, Vodafone, Orange, BT Group, Telstra, Deutsche Telekom, Comcast, Time Warner Cable, CenturyLink, NTT Communications, Tata Communications, SoftBank, China Mobile, Singtel, Telus, Rogers Communications, Bell Canada, Telkom Indonesia, Telkom South Africa, Telmex, Telia Company, Telkom Kenya

State of North Dakota, SEGA, Alameda County Office of Education, Temple University, VERGE, CAME

Information Not Available

Palo Alto Networks K2-Series vs. Zyxel Unified Security Gateway