User`s manual

P-660 Series Support Notes

sheet given by the ISP. Please choose PPPoE as the encapsulation type in the P-660 if

the ISP uses PPPoE.

7. Why does my provider use PPPoE?

PPPoE emulates a familiar Dial-Up connection. It allows your ISP to provide services

using their existing network configuration over the broadband connections. Besides,

PPPoE supports a broad range of existing applications and service including

authentication, accounting, secure access and configuration management.

8. What is DDNS?

The Dynamic DNS service allows you to alias a dynamic IP address to a static

hostname, allowing your computer to be more easily accessed from various locations

on the Internet. To use the service, you must first apply an account from several free

Web servers such as http://www.dyndns.org/.

Without DDNS, we always tell the users to use the WAN IP of the P-660 to reach our

internal server. It is inconvenient for the users if this IP is dynamic. With DDNS

supported by the P-660, you apply a DNS name (e.g., www.zyxel.com.tw) for your

server (e.g., Web server) from a DDNS server. The outside users can always access

the web server using the www.zyxel.com.tw regardless of the WAN IP of the P-660.

When the ISP assigns the P-660 a new IP, the P-660 updates this IP to 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 usable.

9. When do I need DDNS service?

When you want your internal server to be accessed by using DNS name rather than

using the dynamic IP address we can use the DDNS service. The DDNS server allows

to alias a dynamic IP address to a static hostname. Whenever the ISP assigns you a

new IP, the P-660 sends this IP to the DDNS server for its updates.

10. What is DDNS wildcard? Does the P-660 support DDNS wildcard?

Some DDNS servers support the wildcard feature which allows the hostname,

*.yourhost.dyndns.org, to be aliased to the same IP address as yourhost.dyndns.org.

This feature is useful when there are multiple servers inside and you want users to be

able to use things such as www.yourhost.dyndns.org and still reach your hostname.

Yes, the P-660 supports DDNS wildcard that http://www.dyndns.org/ supports. When

using wildcard, you simply enter yourhost.dyndns.org in the Host field in Menu 1.1

Configure Dynamic DNS.