Chapter 6 Configuration Basics

6.5.9 DDNS

Dynamic DNS maps a domain name to a dynamic IP address. The ZyWALL helps maintain this mapping.

MENU ITEM(S) Configuration > Network > DDNS

PREREQUISITES Interface

6.5.10 NAT

Use Network Address Translation (NAT) to make computers on a private network behind the ZyWALL available outside the private network.

The ZyWALL only checks regular (through-ZyWALL) firewall rules for packets that are redirected by NAT, it does not check the to-ZyWALL firewall rules.

MENU ITEM(S) Configuration > Network > NAT

PREREQUISITES Interfaces, addresses (HOST)

Example: Suppose you have an FTP server with a private IP address connected to a DMZ port. You could configure a NAT rule to forwards FTP sessions from the WAN to the DMZ.

1Click Configuration > Network > NAT to configure the NAT entry. Add an entry.

2Name the entry.

3Select the WAN interface that the FTP traffic is to come in through.

4Specify the public WAN IP address where the ZyWALL will receive the FTP packets.

5In the Mapped IP field, list the IP address of the FTP server. The ZyWALL will forward the packets received for the original IP address.

6In Mapping Type, select Port.

7Enter 21 in both the Original and the Mapped Port fields.

6.5.11 HTTP Redirect

Configure this feature to have the ZyWALL transparently forward HTTP (web) traffic to a proxy server. This can speed up web browsing because the proxy server keeps copies of the web pages that have been accessed so they are readily available the next time one of your users needs to access that page.

 

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ZyWALL USG 50 User’s Guide