Manual ZyXEL ZyWALL USG 20 (page 25 of 150) (English)

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Chapter 1 Introduction

ZyWALL USG 20-2000 User’s Guide

2 Open the transceiver’s latch (latch styles vary).

3 Pull the transceiver out of the slot.

1.8.2 Maximizing Throughput

A ZyWALL USG with dual internal buses (see Table 1 on page 5) for Gigabit interfaces 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.

Figure 19 Gigabit Interfaces and Internal Buses

Some ZyWALLs (see Table 1 on page 5) let you add an optional Security Extension Module (SEM) to

enhance the VPN or VPN and Unified Threat Management (UTM) capabilities.

Figure 20 Security Extension Module

• 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 SEM-DUAL module provides the VPN performance enhancements and increases the

maximum anti-virus and IDP traffic throughput from 100 Mbps to 400 Mbps.

1.8.3 Front Panel LEDs

The following tables describe the LEDs.

Table 8 ZyWALL USG 20 ~ USG 1000 Front Panel LEDs

LED COLOR STATUS DESCRIPTION

PWR Off The ZyWALL is turned off.

Green On The ZyWALL is turned on.

Red On There is a hardware component failure. Shut down the device, wait for a few

minutes and then restart the device (see Section 1.5 on page 20). If the LED

turns red again, then please contact your vendor.

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