Set Up A Firewall Rule - ZyXEL Communications ISG50-ISDN User Manual

Integrated service gateway

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Figure 108 Creating the NAT Entry

7.10.3 Set Up a Firewall Rule

The firewall blocks traffic from the WAN zone to the DMZ zone by default so you need to create a

firewall rule to allow the public to send HTTP traffic to IP address 1.1.1.1 in order to access the

HTTP server. If a domain name is registered for IP address 1.1.1.1, users can just go to the domain

name to access the web server.

Click Configuration > Firewall > Add. Set the From field as WAN and the To field as DMZ. Set

the Destination to the HTTP server's DMZ IP address object (DMZ_HTTP). DMZ_HTTP is the

destination because the ISG50 applies NAT to traffic before applying the firewall rule. Set the

Access field to allow and the Service to HTTP, and click OK.

ISG50 User's Guide

Chapter 7 General Tutorials