ZyXEL Communications P-2302HW Using Dynamic DNS DDNS, Prestige 2302 Support Notes, What is DDNS?

Models: P-2302HW

1 128
Download 128 pages 63.22 Kb
Page 40
Image 40
Using Dynamic DNS (DDNS)

Prestige 2302 Support Notes

 

 

 

Menu 21.2 - Filter

Rules Summary

 

 

 

# A Type

Filter

Rules

M m n

- - ----

---------------------------------------------- - - -

1

Y

IP

Pr=6, SA=0.0.0.0,

SP=137,

DA=0.0.0.0, DP=53

N

D

N

2

Y

IP

Pr=17, SA=0.0.0.0,

SP=137,

DA=0.0.0.0, DP=53

N

D

F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.Apply the 'NetBIOS_LAN' filter set in the 'Input protocol filters=' field in SMT menu 3.1 to block packets from the LAN.

Menu 3.1 - General Ethernet Setup

Input Filter Sets: protocol filters= 2

device filters= Output Filter Sets: protocol filters= device filters=

Using Dynamic DNS (DDNS)

1. What is DDNS?

A DNS (Domain Name Service) server stores the mappings of IP address and domain names. For example, when users enters a web site address (the domain name), the DNS server automatically maps the web site address to a public IP address and redirects the request to the intended web server.

Without DNS, users have to enter the IP address of the web server in order to access the web sites. This is very inconvenient and not user-friendly as users have to remember the IP addresses of the web sites.

However, if the web server is located behind the Prestige which is using a dynamic WAN IP address, a fixed mapping cannot be stored in the DNS server database since the WAN IP address changes. Thus Dynamic DNS (DDNS) is used to solve this problem. For example, if you have hosted a web site (say www.zyxel.com) on a server behind the Prestige which is assigned a dynamic WAN IP address from the ISP, users can still access the

40

All contents copyright (c) 2005 ZyXEL Communications Corporation.

Page 40
Image 40
ZyXEL Communications P-2302HW manual Using Dynamic DNS DDNS, Prestige 2302 Support Notes, What is DDNS?