ZyXEL Communications ZYWALL USG 20W - Scenario 1 - Connecting your USG to the Internet; Scenario 2 - WAN Load Balancing and Customized Usage of WAN Connection for Specific Traffic (USG 50 only); Scenario 3 - How to configure NAT if you have Internet-facing public servers; Scenario 4 - Secure site-to-site connections using IPSec VPN

ZyXEL – ZyWALL USG Support Notes
All contents copyright (c) 2010 ZyXEL Communications Corporation.
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Table of Contents
Scenario 1 — Connecting your USG to the Internet ................................................................................................................................................................................... 4
1.1 Application Scenario ....................................................................................................................................................................................................................... 4
1.2 Configuration Guide ....................................................................................................................................................................................................................... 5
Scenario 2 — WAN Load Balancing and Customized Usage of WAN Connection for Specific Traffic (USG 50 only) ............................................................................ 12
2.1 WAN Load Balancing..................................................................................................................................................................................................................... 12
2.1.1 Load Balancing Algorithm ......................................................................................................................................................................................................... 12
2.2 Customized Usage of WAN Connection for Specific Traffic Type............................................................................................................................................... 14
2.3 Application Scenario ..................................................................................................................................................................................................................... 15
2.4 Configuration Guide ..................................................................................................................................................................................................................... 16
Scenario 3 — How to configure NAT if you have Internet-facing public servers .................................................................................................................................... 22
3.1 Application Scenario ..................................................................................................................................................................................................................... 22
3.2 Configuration Guide ..................................................................................................................................................................................................................... 23
Scenario 4 — Secure site-to-site connections using IPSec VPN ............................................................................................................................................................... 27
4.1 Application Scenario ..................................................................................................................................................................................................................... 27
4.2 Configuration Guide ..................................................................................................................................................................................................................... 28
Scenario 5 — Secure client-to-site connections using IPSec VPN ............................................................................................................................................................ 35
5.1 Application Scenario ..................................................................................................................................................................................................................... 35
5.2 Configuration Guide ..................................................................................................................................................................................................................... 36
Scenario 6 — Deploying SSL VPN for Tele-workers to Access Company Resources (USG 50 only) ....................................................................................................... 45
6.1 Application Scenario ..................................................................................................................................................................................................................... 45
6.2 Configuration Guide ..................................................................................................................................................................................................................... 46
Scenario 7 — Reserving Highest Bandwidth Management Priority for VoIP Traffic ............................................................................................................................... 55
7.1 Application Scenario ..................................................................................................................................................................................................................... 55
7.2 Configuration Guide ..................................................................................................................................................................................................................... 56