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P-660 Series Support Notes
this case, we use the router mode which works as a general Router plus an ADSL
Modem.
6. How do I know I am using PPPoE?
PPPoE requires a user account to login to the provider's server. If you need to
configure a user name and password on your computer to connect to the ISP you are
probably using PPPoE. If you are simply connected to the Internet when you turn on
your computer, you probably are not. You can also check your ISP or the information
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
All contents copyright © 2005 ZyXEL Communications Corporation.
- P-660 series 1
- ZyNOS FAQ 4
- General FAQ 10
- ADSL FAQ 14
- General Application Notes 16
- • Get 75
- • GetNext 75
- SNMP: 78
- • P-660 Setup 79
- • UNIX Setup 79
- • Benefits 86
- • How does the IPPR work? 86
- • What is IP Multicast ? 93
- • IP Multicast Setup 94
- Support Tool 100
- 101
- Step 4 110
- CI Command Reference 113
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