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Chapter 4: Advanced Setup Options 27
4
Advanced Setup Options
In addition to its basic setup options, the Zoom IG-4160
Internet Gateway includes options for specialized, or
advanced, settings. If you are like most users, you will not need
these options. Your Gateway is designed so that the basic
setup settings are sufficient for most users. This chapter is
applicable to you only if you need to perform sophisticated
tasks such as those listed below:
•
Modify the firewall to open up access portals to special
applications, such as games or videoconferencing.
•
Configure the LAN DHCP server.
•
Configure a Virtual Server.
•
Configure a DMZ Host.
•
Use a non-standard FTP port.
•
Configure LAN MAC Addresses.
•
Configure the Router Access Control option.
•
Use the WAN Ping Response Disable feature.
•
Use the Clone WAN MAC Address option.
4.1 Modifying Firewall Settings
If you want to use special applications such as certain Internet
games, videoconferencing, and Internet telephony, you often have
to use non-standard ports or multiple open ports. A port is an
endpoint to a logical connection; the port number identifies the
logical channel being used; for example, port 21 is associated with
FTP (File Transport Protocol). By definition, your Gateway’s
firewall prevents unauthorized access to any open ports. Some
applications require access to ports that your firewall would
normally deny. You must modify the Gateway’s firewall settings if
you want to accommodate these types of applications.