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  • ZyXEL ZyWALL USG20 Internet Security Firewall with 4 Gigabit LAN/DMZ Ports, 2 IPSec VPN, SSL VPN, and 3G WAN Support
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ZyXEL ZyWALL USG20 Internet Security Firewall with 4 Gigabit LAN/DMZ Ports, 2 IPSec VPN, SSL VPN, and 3G WAN Support

by ZyXEL
| 20 answered questions

List Price: $174.99
Price: $139.99 & FREE Shipping. Details
You Save: $35.00 (20%)
Only 15 left in stock (more on the way).
Ships from and sold by Amazon.com. Gift-wrap available.
  • Hybrid VPN, both SSL and IPSec VPNs supported for flexible deployment.
  • Comprehensive threat protection with firewall, VPN and content filtering.
  • Flexible security zone using VLAN technology to segregate local networks.
  • User-aware policy engine can set bandwith or network access based on user login.
  • Bandwidth management for traffic prioritization for VoIP or mission critical applications.
44 new 5 used from $97.99 1 refurbished from $125.91

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$139.99 & FREE Shipping. Details Only 15 left in stock (more on the way). Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

ZyXEL ZyWALL USG20 Internet Security Firewall with 4 Gigabit LAN/DMZ Ports, 2 IPSec VPN, SSL VPN, and 3G WAN Support + Ubiquiti Networks UniFi AP Enterprise WiFi System + Ubiquiti UniFi Long Range Access Point, (2.4 GHz, UAP-LR-US, US Version)
Price for all three: $291.96

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This item: ZyXEL ZyWALL USG20 Internet Security Firewall with 4 Gigabit LAN/DMZ Ports, 2 IPSec VPN, SSL VPN, and 3G WAN Support
Customer Rating (253) (20) (112) (13)
Price $ 139.99 See price in cart $ 65.30 $ 224.98
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Sold By Amazon.com CTI Computech Amazon.com SIL MICRO
Connectivity Technology Wired Ethernet Wireless wired
Data Transfer Rate 150 300 90 megabits per second 400
Total Lan Ports 4 5 4 4
Wireless Comm Standard 802 11 BGN 802 11 ABG 802 11 N 802 11 ABGN
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Product Description

Style: ZWUSG20

Product Description

The ZyWALL USG 20 is a Unified Security Gateway, integrated with complete, enterprise-level and advanced security solutions designed for Small/Medium Business (SMB) recommended for up to 5 PC users. Its flexible configuration helps network administrators set up the network and enforce security policies more efficiently. With certified by ICSA SPI Firewall and IPSec VPN, the ZyWALL USG 20’s security features also include IPSec VPN, SSL VPN, Firewall and Content Filter. It also provides bandwidth management, for QoS of VoIP or mission critical applications. Moreover, IPSec VPN and SSL VPN design for telecommuters and home workers can access data more easily and safely at home. Remote access with SSL VPN requires only a standard web browser. ZyWALL USG 20’s excellent throughput is the key to implement features of an enterprise level to provide a full-time, non-stop and secure service.

From the Manufacturer

Big Security for Small Businesses -Unified Security Gateway ZyWALL USG20

The ZyWALL USG20 is a Unified Security Gateway designed to provide complete, enterprise-level advanced security solutions to Small and Home Office networks, recommended for up to 5 PC users. Its flexible configuration is designed to help network administrators efficiently set up, manage, and enforce network security policies.

The USG20’s web-content filtering engine goes a step beyond simple URL blocking. It allows users to manage the level of content filtering, giving complete control over what types of websites that can be accessed on the network. Administrators can choose between BlueCoat and Commtouch web filtering services.

To further defend networks and provide greater control and ease of use, the USG20 also employs an anti-spam service to flag and discard commercial and unwanted e-mail messages, protecting important information from getting lost in the clutter.

Application Patrol gives you detailed control over the applications allowed to run on your network, while the built-in 150Mbps throughput firewall and web-content filtering protect your network from DoS attacks, phishing, and other threats.

Built with powerful Integrated High Performance Security architecture designed for Gigabit connections, a VPN throughput of 75Mbps, up to 6,000 max sessions and 5 concurrent IPSec VPN tunnels, the USG20 has the power to monitor and protect your network without sacrificing network performance.

  • Robust hybrid VPN (IPSec, SSL, and L2TP*)
  • Easily connect with mobile devices
  • IPv6 Support
  • QoS options for latency-sensitive applications
  • Compatible with Vantage Reporting and Management software
  • 30day trial of the antivirus software

* Enabled by ZLD3.0 firmware upgrade

Flexible, secure VPN options

The USG20 is designed to allow secure VPN connections no matter what device or network settings are being used. IPSec VPN support allows secure connections to branch offices, partners, and headquarters; road warriors and telecommuters can use SSL to securely access the company network without having to install VPN software.

Easy Mobile Access

The new ZLD3.0 firmware upgrade enables L2TP support on all USG devices, making it easy for Android, iOS, and other mobile devices to establish VPN tunnels to remote networks directly from their native settings.

IPv6 Ready

With the advent of the new ZLD3.0 firmware, the USG20 is fully compatible with both IPv4 and IPv6 networks. Full backward compatibility allows VPN tunnels to be created between networks newly upgraded to IPv6 and older IPv4 networks, ensuring a seamless transition and painless network upgrades.

VoIP Optimized

The USG20’s network optimization functionality makes it far more than a network security device. Bandwidth management options let administrators prioritize latency-sensitive applications like VoIP and videoconferencing, ensuring high-quality connections without lag or performance issues.

Vantage Management and Reporting

The USG20 supports the use of ZyXEL’s Vantage CNM and Vantage Reporting software, allowing centralized management and monitoring of multiple ZyWALL devices on a single network.

Vantage Reporting offers a comprehensive set of real-time and historical reports including firewall attacks, bandwidth usage, Website usage, and more - all organized into an automated, easy-to-read format that can be viewed from anywhere. Administrators can use this data to easily identify security problems and their causes and take prompt action.

Vantage CNM provides a suite of diagnostic and management tools that allows management of multiple ZyWALL devices from a centralized interface, reducing the time, cost, and complexity involved in VPN and security management. VPN monitoring allows network administrators to actively troubleshoot VPN problems as they occur, while centralized configuration of UTM functionality allows network administrators to manage license subscriptions, update devices, and isolate and repair security problems across all ZyWALL devices on a network.

Powerful Email security

The ZyWALL USG Series delivers industry-leading email protection against spam, phishing and virus-laden emails, powered by Commtouch. The high performance Commtouch technology comes from the unique recurrent pattern detection (RPD) mechanism that scours millions of new patterns each day (24x7x365) to block spam messages in real-time. In addition, the ZyWALL USG applies sender-based IP reputations to remove over 80% of unwanted mails and to offer zero-hour virus outbreak protection, capable of blocking or delaying suspicious messages hours before commercial anti-virus signatures are available.

ZyWALL USG Series Firewall Comparison

Model USG20W USG20 USG50 USG100 USG200 USG300 USG1000 USG2000
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Recommended number of PC Users 1-5 1-5 1-10 10-25 25-50 50-75 75-200 200-500
Unlimited User (No Per Node Limitation)
High Performance multi-layer threat Protection

Hardware Specifications

10/100/1000 Interfaces (ALL GbE Copper) 4x LAN/DMZ, 1x WAN 4x LAN/DMZ, 1x WAN 4x LAN/DMZ, 2x WAN 5x LAN/DMZ, 2x WAN 5x LAN/DMZ, 2x WAN
7x Configurable 5x Configurable 6x Configurable

System Capacity and Performance

SPI Firewall Throughput (Mbps) (Largest Packet Size) 150 150 180 180 250 300 400 2000
VPN Throughput (AES)(Mbps)
(Largest Packet Size)
75 75 90 90 90 130 180 600
UTM Throughput (AV+IDP) (Mbps)(Largest Packet Size) 24 30 40 80 100 400
Max Sessions 6000 6000 10000 20000 40000 60000 500000 1000000
Max Concurrent IPSec VPN Tunnels 5 5 5 50 100 200 1000 2000
Max Concurrent SSL VPN Tunnels 1 1 5 5 10 25 250 750
Included SSL VPN Users 1 1 2 2 2 2 5 5
Multiple WAN Load Balance / Fail Over

Security Licenses

Anti-Virus (ZyXEL or Kaspersky) 1 Year












iCard Content Filtering (BlueCoat or Commtouch) 1 Year
















Total Security Service Kit(1 Year Kaspersky AV, 1 Year ZyXEL IDP, 1 Year BlueCoat CF bundle) ICTS1YUSG50 ICTS1YUSG100 ICTS1YUSG200 ICTS1YUSG300 ICTS1YUSG1000 ICTS1YUSG2000
iCard SSL Upgrade Licenses(One Time) 2-5 Users SSL2TO5USG50 2-5 Users SSL2TO5USG100 2-10 Users

2-10 Users SSL2TO10USG300

2-25 Users

10-25 Users

5-25 Users

25-50 Users

5-50 Users

5-250 Users

25-250 Users

50-250 Users

5-50 Users

5-250 Users SSL5TO250USG2000

5-750 Users

50-250 Users

50-750 Users

750-2000 Users

Product Details

Style: ZWUSG20
  • Product Dimensions: 5.8 x 1.2 x 8.7 inches ; 12.8 ounces
  • Shipping Weight: 2.3 pounds (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item can be shipped to select countries outside of the U.S. Learn More
  • ASIN: B0042W7CAI
  • Item model number: ZWUSG20
  • Average Customer Review: 3.9 out of 5 stars  See all reviews (253 customer reviews)
  • Amazon Best Sellers Rank: #5,752 in Electronics (See Top 100 in Electronics)
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
  • Date first available at Amazon.com: October 22, 2009

Customer Questions & Answers

Customer Reviews

3.9 out of 5 stars

Most Helpful Customer Reviews

77 of 79 people found the following review helpful By Classless on August 30, 2011
Style Name: ZWUSG20
I bought this router from a competitor but wanted to leave a review here. The amount of features that you get out of this router is unbelievable for the price you pay. I'll point out my pros and cons about the unit but I will start by saying that this is not a dlink/linksys/netgear plug and play router, you need to have a good understanding of networking in order to use the unit to even half of its full potential.



SSL VPN (ridiculously easy to configure, and there is a network extension option so that you can actually be put on the network and have full access to your resources)

Extensive firewall options (seriously there's a ton of options)

Cisco-like CLI

Ability to integrate with Active Directory (I use this with the ssl vpn, can be kind of tricky to configure though)

Bandwidth Management (very flexible options for this, you can really lock down how much bandwidth devices/programs can have and set priorities as well)

Object based (this is really useful, instead of specifying IP address in NAT/Firewall/BWM you can create objects and then specify the object so that in case you need to change it, you only need to change it in one location. You can even group objects together to consolidate firewall/BWM rules)

True DMZ (you can actually dedicate a port to the DMZ and then just have the others on lan subnets)

Free U.S. based technical support for the life of the unit (I called them before purchasing the unit to get information on it and the gentlemen was very courteous and knowledgeable. It's comforting to know that if I have issues I can get a hold of someone, who is American, within minutes). The firmware updates are free for the life of the unit as well.
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29 of 29 people found the following review helpful By Kelly on October 26, 2010
Style Name: ZWUSG100 Verified Purchase
This is one of the best priced and most feature rich routers I've ever used. I've used sonic walls about 5 years in the past and we had a linksys dual wan router before this. Once we needed more than one external ip the linksys just couldn't cut it. The firewall would either be fully off or fully on with secondary ip's, so we had to find another solution. Having used sonic walls in the past I looked at them first but a price/feature comparison lead me straight to the ZyWall USG100.

Setup for the device seems complicated at first, with assigning ip's to machines, ports to groups, and other things that I've not encountered with a firewall before. But these extra steps in the beginning save so much time later on. Instead of having routes and many firewall rules assigned to an ip, you would assign it to a virtual object stored in the zywall which has all of it's information. So when a change to the machines ip is required you don't have to go in and change every single rule and route, you just modify the virtual object and your done.

So far it's done everything we've needed and suprised us with its flexibility. And it would have 5 stars from me except for one slight failing. The vpn setup is a bit unruly when it comes to macs. Just for a standard vpn it requires a free 3rd party program (ipsecuritas) with a bit of setup that a normal user would balk at. Also the ssl vpn which ZyXEL boasts about is just a no go for macs, it just isn't supported.

It's a great product for a great price. It does everything well except for the vpn working with macs. If they can fix that then they would get 5 stars from me.
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39 of 42 people found the following review helpful By Amazon Customer on June 23, 2011
Style Name: ZWUSG50 Verified Purchase
They ZyWALL USG50 has performed very well over the past 2 months. The firewall offers excellent hardware and features for the price. However, the subscription services from ZyXEL leave much to be desired.

The Good:
* Hardware appears to be solid
* GigE ports
* Stable software
* Good set of built-in non-subscription security features
* Very stable VPN implementation
* Very usable SSL VPN (does not require a subscription)
* Excellent throughput with security features turned on for the price

The Bad:
* The process of renewing IDP, AV, Content Filtering subscriptions is convoluted
* The built-in reporting functionality is somewhat limited (e.g. Content Filter reports) and the server-based report functionality does not seem to be implemented
* The quality of Content Filtering (AppPatrol) and IDP is questionable - protocols are miss-recognized and I am getting some false positives from the IDP
* ZyXEL support is non-responsive
* Functionality is rather limited unless you pay ~$220 / year for the subscription services - none of the promotional materials mention that you only get 30 days of IDP, AV, Anit-SPAM, and Content Filtering
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46 of 52 people found the following review helpful By WPB of C on November 22, 2010
Style Name: ZWUSG20
While ZyXEL may not be that well known in the consumer network gear market, they make some good enterprise level gear. The USG line from ZyXEL is middle ground between simple consumer products and highly configurable enterprise products.

I have used the ZyXEL ZyWALL 2 PLUS Internet Security Firewall, 4 Port 10/100 Fast Ethernet Switch, w/ 5 IPSec VPN Tunnelsand the (discontinued) 1P for several years without issue; primarily for maintaining an IPSEC VPN tunnel. While the 2 Plus and 1P were more consumer grade, the USG20 is a step beyond. It has a plethora of configuration options available, and wringing out optimal performance from the device is not for the faint of heart. Having a background in network configuration will make the job easier, otherwise, plan to spend some time with the instruction manual.

ZyXEL's online resources, customer support and forum support are very good; they strive to make sure your problems get solved. They offer timely firmware updates to correct problems.

The ZyWALL USG20 not only has basic packet inspection firewall and traffic anomaly detection functionality, but has a significant number of features at this price point:

* Flexible Security Zones
* Bandwidth Management
* Content filtering/ Anti-SPAM
* Reporting

The UI is somewhat straightforward, however, the concept of Objects may confuse some. Objects are used to define re-used elements throughout the configuration. For example, an IP address range may be defined and named IP_RANGE_1.
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ZyXEL ZyWALL USG20 Internet Security Firewall with 4 Gigabit LAN/DMZ Ports, 2 IPSec VPN, SSL VPN, and 3G WAN Support
This item: ZyXEL ZyWALL USG20 Internet Security Firewall with 4 Gigabit LAN/DMZ Ports, 2 IPSec VPN, SSL VPN, and 3G WAN Support
Price: $139.99
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