Prestige 2302 Support Notes
All contents copyright (c) 2005 ZyXEL Communications Corporation.
40
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
