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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.
ICSA-certified IPSec VPN, ICSA Firewall
Power supply:
15 W

Data transmission

Firewall throughput:
100 Mbit/s
VPN throughput:
30 Mbit/s

Management features

LED indicators:


Number of VPN connections:
VPN tunnels quantity:

Operational conditions

Operating relative humidity (H-H):
20 - 95%

Other features

Authentication method:
Internal User Database/Microsoft Windows Active Directory/External LDAP / RADIUS User Database/ Xauth over RADIUS for IPSec IPV /Force User Authentication (Transparent Authentication)/ IP/MAC address binding
Connectivity technology:
Ethernet LAN (RJ-45) ports:
Networking features:
Ethernet / PPPoE /Tagged VLAN (802.1Q)
Power requirements:
100-240 VAC, 50/60 Hz
USB 2.0 ports quantity:
WAN connection:
Ethernet (RJ-45)


Management protocols:
HTTP, HTTPS, Console, Telnet, SSH, FTP/FTP-TLS/Web GUI


Content filtering:
URL Blocking, Keyword Blocking, Exempt List (Blacklist and Whitelist), Blocks Java Applet, Cookies, Active X, Dynamic URL Filtering Database (BlueCoat)
VPN support:
- ICSA-certified IPSec VPN\n- IPSec\n- Algorithm: AES/3DES/DES\n- Authentication: SHA-1/MD5\n- Key management: Manual key/IKE\n- Perfect forward secrecy: (DH group) supprt 1, 2, 5\n- IPSec NAT traversal\n- Dead peer detection/relay detection\n- PKI (X.509

Weight & dimensions

Dimensions (WxDxH):
216 x 140 x 33 mm
380 g