ZyXEL Communications ZYWALL USG 2000 Quick Start Manual page 13

Maximizing Throughput
The ZyWALL has one internal bus for ports P1-P7 and another for port
P8. To maximize the ZyWALL's throughput, use P8 for your connection
with the most traffic.
The ZyWALL has a slot for adding an optional Security Extension
Module (SEM) to enhance the ZyWALL's VPN and /or Unified Threat
Management (UTM) capabilities.
• The VPN module (SEM-VPN) increases the maximum VPN
throughput from 100 Mbps to 500 Mbps, the maximum number of
IPSec VPN tunnels from 1,000 to 2,000 and the maximum number
of SSL VPN users from 250 (with a license) to 750 (with a license).
• The UTM module (SEM-UTM) increases the maximum anti-virus
and IDP traffic throughput from 100 Mbps to 400 Mbps.
• The SEM-DUAL module provides the performance enhancements
of both the VPN and UTM modules.
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