ZyXEL Communications nsa325 业主指南

Chapter 9 Network

Media Server User’s Guide

Use UPnP (Universal Plug and Play) port mapping to allow access from the WAN to services you 
select on the NSA. It is recommended that you place the NSA behind an Internet gateway firewall 
device to protect the NSA from attacks from the Internet (see 

 for firewall type suggestions). Many such Internet gateways use UPnP to simplify peer-to-peer 

DNS

DNS (Domain Name System) is for mapping a domain name to its corresponding IP 
address and vice versa. If you have the IP address(es) of the DNS server(s), enter 
them. 

Dynamic

Select the option to have the NSA get a DNS server address automatically.

Static

Select this option to choose a static DNS server address. Type the DNS server IP 
address(es) into the fields below.

Primary DNS 

Server

Type a primary DNS server IP address.

Secondary DNS 

Server

Type a secondary DNS server IP address.

HTTP (Web Configurator)

Enable Another Web 
Configuration Port

Select this to configure an additional HTTP port for accessing the web configurator. 
Specify a number in the Port Number field.

Jumbo Frames

Jumbo frames improve network performance. You must have a 1 Gbps (Gigabit 
Ethernet) network that supports jumbo frames. Select the largest size of frame that all 
of your network devices (including computer Ethernet cards and switches, hubs, or 
routers) support. 

When enabled, you can choose between 4 KB, 8 KB, and 9 KB frame sizes.

Note: If you enable jumbo frames on the NSA in a network that does not support them, 

you will lose access to the NSA. If this occurs, you will have to restore the factory 
default configuration. Push the RESET button on the NSA’s rear panel and 
release it after you hear a beep.

Network Diagnostic 
Tool

Use this section to test the network connection to a particular IP address or domain 
name. Select an address or type it into the field. Then click Ping to have the NSA send 
a packet to test the network connection. 

•

Successfully pinged host - The NSA is able to “ping” the host, the network 

connection is OK.

•

Unable to ping host - The NSA is able to “ping” the selected host.

Apply

Click this to save your TCP/IP configurations. After you click Apply, the NSA restarts. 
Wait until you see the Login screen or until the NSA fully boots and then use the NAS 
Starter Utility to rediscover it.

Reset

Click this to restore your previously saved settings.

Table 33   Network > TCP/IP (continued)