What Is Bootp/Dhcp; What Is Ddns; When Do I Need The Ddns Service; What Ddns Servers Does The Prestige Support - ZyXEL Communications P-2608HWL-D1 Support Notes

P-2608HWL Series Support Notes

What is BOOTP/DHCP?

BOOTP (Bootstrap Protocol) and DHCP (Dynamic Host Configuration Protocol) are mechanisms to
dynamically assign an IP address to a TCP/IP client from the server. In this case, the Prestige Internet Access
Sharing Router is a BOOTP/DHCP server. Windows clients use DHCP to request an internal IP address, while
WFW and WinSock clients use BOOTP. TCP/IP clients may specify their own IP or utilize BOOTP/DHCP to
request an IP address from the Prestige (the server).

What is DDNS?

The Dynamic DNS service allows you to map a dynamic IP address to a static hostname, allowing your
computer to be more easily accessed from various locations on the Internet. To use this service, you must first
apply an account from one of the several free DDNS service providers such as WWW.DYNDNS.ORG.
Without DDNS, you have to tell your users the WAN IP address of your server for them to access. It is
inconvenient for the users if this IP is dynamic which changes. With DDNS supported on the Prestige, you use a
DNS name (e.g., www.zyxel.com.tw) supplied by the DDNS service provider to your server (e.g., Web server).
Outside users can always access the web server at www.zyxel.com.tw regardless of whether the WAN IP on the
Prestige is dynamic or static.
When the ISP assigns the Prestige a new IP address, the Prestige updates this IP address to the DDNS server so
that the server can update its IP-to-DNS entry. Once the IP-to-DNS table in the DDNS server is updated, the
DNS name for your web server (i.e., www.zyxel.com.tw) is still easily accessible.

When do I need the DDNS service?

When you want your internal server to be accessible by using DNS name rather than using a dynamic IP
address, use the DDNS service. The DDNS server maps a dynamic IP address to a static hostname. Whenever
the ISP assigns you a new IP address, the Prestige sends this IP address to the DDNS server to update its
IP-DNS table.

What DDNS servers does the Prestige support?

Currently, the Prestige supports WWW.DYNDNS.ORG for DDNS service. This is the web site to which you
apply the DNS and update the Prestige WAN IP.
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