Zywall usg 20

ZyXEL ZyWALL USG 20

External, 150 Mbit/s, Built-in router

ZyXEL ZyWALL USG 20-VPN

External, 350 Mbit/s

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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

ZyXEL ZyWALL USG 20W-VPN

350 Mbit/s