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Cisco Secure Firewall vs Zyxel Unified Security Gateway comparison

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Comparison Buyer's Guide

Executive Summary

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

Cisco Secure Firewall
Average Rating
8.2
Reviews Sentiment
6.9
Number of Reviews
471
Ranking in other categories
Firewalls (3rd), Cisco Security Portfolio (2nd)
Zyxel Unified Security Gateway
Average Rating
6.6
Reviews Sentiment
4.9
Number of Reviews
4
Ranking in other categories
Unified Threat Management (UTM) (12th)
 

Featured Reviews

RajeshKumar - PeerSpot reviewer
Network Consultant at a outsourcing company with 1,001-5,000 employees
Unified policies have strengthened zero-trust demos and automate rapid threat containment
Feedback and Improvement Areas – Cisco Secure Firewall (Customer Perspective) From a customer point of view, there are a few improvement areas observed while positioning Cisco Secure Firewall in competitive scenarios. 1. Dashboard & Visibility Enhancements Customers often compare firewall dashboards across different OEMs during evaluation. * Competing vendors typically provide more feature-rich and visually detailed dashboards. * There is a perception that Cisco dashboards still require enhancement in terms of visualization, consolidated reporting, and built-in analytics. * Some OEMs advertise additional security capabilities clearly within their publicly available data sheets, making competitive positioning easier. In comparison, Cisco sometimes references separate documentation or explains how certain capabilities (such as anti-spam or antivirus functionality) can be achieved through integration or ecosystem components rather than native, built-in features. This creates a perception gap during customer discussions. Improvement Opportunity: * Enhance dashboard capabilities. * Clearly articulate feature availability in public documentation and data sheets. * Reduce dependency on cross-referenced documentation for commonly compared features. 2. Virtual Firewall / Multi-Instance Capabilities in Lower Models Another competitive challenge relates to virtual firewall capabilities. * Several OEMs provide virtual firewall (VDOM-like) functionality in lower-end models. * In Cisco’s portfolio, multi-instance capability typically starts from higher-end platforms such as the 3K series or higher. * Customers looking for smaller deployments with logical segmentation are often forced to consider higher models, resulting in a price jump. Competitors also offer: * Compact hardware models * Dongle-based firewall appliances * Smaller entry-level products with virtual segmentation In Cisco’s case: * To achieve similar multi-instance functionality, customers must opt for higher-tier models. * This creates a significant pricing gap in entry-level or SMB deployments. This pricing difference becomes a key factor when customers compare solutions. If competitors offer a lower-cost model with virtual segmentation, and Cisco requires a higher platform investment, customers may lean toward alternative OEMs. 3. Documentation Gaps – OT Protocol Visibility In our lab environment, we have deployed Cisco Secure Firewall and are using Application Visibility and Control (AVC) for OT network monitoring. Observations: * OT protocols are clearly visible within application visibility. * The firewall successfully identifies and classifies OT traffic. However: * This capability is not clearly mentioned in publicly available documentation. * When a feature is available and functional, it should be explicitly documented in data sheets and feature guides. The need for third-party integration depends on what we are looking for. Here I am saying that the integration with Cisco NAC can be done because RTC functionality is only available with Cisco ISE and the firewall integration. For other ecosystems, if we use a NAC solution that is not Cisco, we can still integrate it for user authentication, such as with VPN user authentication. But in that case, we don't achieve the same functionality, such as RTC with other NAC solutions. This is one aspect. Another part is that if we are using it, it always happens with some NAC solutions because we have Cisco NAC and Cisco firewall; we want consistent policy across the network, whether the user is on-prem or using VPN services. If this is a unified OEM solution, in that case, we require an agent, such as the Cisco Secure Client. That allows us to easily check the posture status of the remote user and connect to the network effortlessly. But if we are using a third-party solution, we can't achieve that. From a SIEM perspective, certain prerequisites must be fulfilled before integration with Cisco Secure Firewall can be completed. The feasibility of integration depends on the capabilities of the SIEM platform. If the SIEM solution supports the required APIs and event handling mechanisms, similar functionality can be achieved. Therefore, integration itself is generally not the challenge; the key consideration is the desired security outcome within the overall ecosystem. If the customer does not have a SIEM solution and intends to automate quarantine actions or enforce restricted access for users, a Network Access Control (NAC) solution becomes mandatory. In this scenario, the recommended NAC solution is Cisco Identity Services Engine (Cisco ISE). Automated quarantine and dynamic access control workflows are dependent on NAC capabilities. From a feature enhancement perspective for Cisco Secure Firewall, deeper NAC-driven integration adds significant value. 1. TrustSec / Tag-Based Policy Enforcement Cisco ISE supports Cisco TrustSec, which enables Security Group Tag (SGT)-based segmentation. * In traditional (legacy) networks, firewall policies are created based on IP addresses. * With TrustSec, policies are defined based on user identity, group membership, and security tags instead of IP subnets. * When users authenticate to the network, Cisco ISE assigns Security Group Tags (SGTs). * These tags are shared with Cisco Secure Firewall. * The firewall then enforces policies based on SGT-to-SGT rules rather than IP-to-IP rules. Benefits: * Significant reduction in the number of firewall rules * Simplified policy management * Improved scalability * Easier implementation of role-based access control This integration enhances operational efficiency and security posture. 2. Rapid Threat Containment (RTC) Another key capability is Rapid Threat Containment (RTC). If Cisco Secure Firewall detects malicious activity—such as malware download attempts identified via signature-based or advanced threat detection—it can notify Cisco ISE about the compromised endpoint. Based on this input: * Cisco ISE can automatically quarantine the user * The endpoint can be moved to a restricted VLAN * Access can be dynamically limited without manual intervention This automated workflow ensures faster response time and reduces the risk of lateral movement within the network. 3. VPN and Posture Assessment This functionality is not limited to wired or LAN users. For VPN users: * Authentication can be integrated with third-party NAC solutions. * However, if posture assessment (device compliance checking) is required in addition to authentication, Cisco ISE integration with Cisco Secure Firewall becomes essential. Cisco ISE enables: * Endpoint posture validation * Dynamic policy assignment * Automated remediation workflows
reviewer2399337 - PeerSpot reviewer
Sales and technical consultant at a manufacturing company with 10,001+ employees
User has benefited from stable performance and effective completion of security tasks
I use it mostly for VPN and for some firewall solutions When considering my main use case with VPN, I can say that I got the Zyxel Unified Security Gateway, and it works fine. However, we are thinking about using a different solution based on open source because Zyxel Unified Security Gateway…

Quotes from Members

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

Pros

"On the network side, where you create your rules for allowing traffic — what can come inside and what can go out — that works perfectly, if you know what you want to achieve. It protects you."
"What makes Cisco Secure Firewall appealing to customers is that all the features are the same across all firewalls, but customers appreciate that it is a stable solution and more secure."
"So far, it has been very stable."
"When it comes to the integration among Cisco tools, we find it easy. It's a very practical integration with other components as well."
"In summary, this is a good product and I recommend it."
"We have not had to deal with stability issues."
"I have worked on the best firewalls in the market, and Cisco ASA is one of the best."
"So far, there hasn't been any breach, so we are very happy."
"This is a capable appliance and the standard features work well for us."
"The most valuable features of the solution stem from web filtering, malware protection, and antivirus."
"The solution can scale well."
"The Zyxel Unified Security Gateway solution is stable and does its job effectively."
"The cost is very low."
 

Cons

"The process of procuring modern-day technology within the DOD needs to improve."
"There are scalability limitations with FirePOWER on the ASA, so determining anticipated throughput requirements is critical."
"Cisco ASA doesn't provide training and certification for engineers without payments."
"The solution could offer better control that would allow the ability to restrictions certain features from a website."
"This "Module" should actually be packaged and marketed as a "Starter Kit" or an entry-level, feature-limited offering (with no building-block upgrade path; it's a hardware ceiling)."
"Its user interface is good, but it could be better. Currently, you have to know what to do before you can manage a device. If you don't know what to do, you can mess things up. There are some devices that are easier, such as FortiGate. The user interface of FortiGate is more intuitive. It is very easy to log in and configure things."
"Sometimes, the throughput and CPU counter issues were faced, maybe because we started to use it a long time ago."
"My team tells me that other solutions such as Fortinet and Palo Alto are easier to implement."
"Although manageable, the user interface is a little bit slow and could be improved. The advanced UI allows me to do whatever I want, but this is where the issue of speed exists."
"Sometimes it reboots when you least expect it, and that's the main issue."
"The product has some scalability and data management issues where improvements are required."
"The integration capability is quite challenging. The system is very complicated, and many features are hidden."
"I have never seen it in any company that I've worked with before, and I would advise other companies not to buy it."
 

Pricing and Cost Advice

"The licensing features are getting more complicated. These should be simplified."
"I like its licensing because you buy the license once, and it is yours. We don't have to go for a subscription. So, I liked how they licensed Cisco ASA. Our clients are also very satisfied with its licensing model."
"The program is very expensive."
"Licensing is expensive compared to other solutions."
"We bought a three-year license as a part of the enterprise agreement, which includes help with implementation and troubleshooting. We have a big data center with many applications, so implementation was not straightforward. We had to put effort into it. It wasn't an easy or straightforward implementation. The support that we got from Cisco engineers with the three-year premium license was helpful. The enterprise agreement helped to consume the licenses in a practical and faster way and streamline the implementation."
"Pricing is why we had to go for a UTM. For us to achieve what we needed, if we had gone with the ASA, the cost would have been high compared to getting one box (UTM)."
"It was initially heavy on my pocket, but it soon actualised its worth."
"With the bundling mode with Duo licensing, it's now better. It's better to have one simplified global licensing mode, and this is what Cisco has done with bundling. The next-generation firewalls include a set of features such as filtering, emails, and IPS. This combination offers the best way for customers to manage their operating expenses."
"This gateway is pretty cheap."
"The price of Zyxel Unified Security Gateway is good compared to other similar products in the market."
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Comparison Review

it_user206346 - PeerSpot reviewer
Security Consultant at Webernetz.net - Network Security Consulting
Mar 11, 2015
Cisco ASA vs. Palo Alto Networks
Cisco ASA vs. Palo Alto: Management Goodies You often have comparisons of both firewalls concerning security components. Of course, a firewall must block attacks, scan for viruses, build VPNs, etc. However, in this post I am discussing the advantages and disadvantages from both vendors concerning…
 

Top Industries

By visitors reading reviews
Outsourcing Company
15%
Construction Company
10%
Financial Services Firm
8%
Manufacturing Company
8%
Comms Service Provider
18%
Outsourcing Company
9%
Financial Services Firm
8%
Construction Company
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business195
Midsize Enterprise129
Large Enterprise241
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 at large. In my opinion, Fortinet would be the best option and l use Fortinet too...
Which is better - Fortinet FortiGate or Cisco ASA Firewall?
One of our favorite things about Fortinet Fortigate is that you can deploy on the cloud or on premises. Fortinet Fortigate is very stable, reliable, and consistent. We like that we can manage the e...
How does Cisco's ASA firewall compare with the Firepower NGFW?
It is easy to integrate Cisco ASA with other Cisco products and also other NAC solutions. When you understand the Cisco ecosystem, it is very simple to handle. This solution has traffic inspection ...
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 comparisons with other solutions. When our license expires, we plan to explore ope...
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 looking for something new that is slightly simpler. Regarding user experience, the...
What is your primary use case for Zyxel Unified Security Gateway?
I use it mostly for VPN and for some firewall solutions. When considering my main use case with VPN, I can say that I got the Zyxel Unified Security Gateway, and it works fine. However, we are thin...
 

Also Known As

Cisco Adaptive Security Appliance (ASA) Firewall, Cisco ASA NGFW, Adaptive Security Appliance, Cisco Sourcefire Firewalls, Cisco ASAv, Cisco Firepower NGFW Firewall, Cisco Secure Firewall ASA Virtual - BYOL
No data available
 

Overview

 

Sample Customers

There are more than one million Adaptive Security Appliances deployed globally. Top customers include First American Financial Corp., Genzyme, Frankfurt Airport, Hansgrohe SE, Rio Olympics, The French Laundry, Rackspace, and City of Tomorrow.
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