General FAQ

1. How can I manage Prestige 660?
2. What is the default user name and password to loging web configurator?
3. How do I know the P660's WAN IP address assigned by the ISP?
4. What is the microfilter or splitter used for?
5. The P660 supports Bridge and Router mode, what's the difference between them?
6. How do I know I am using PPPoE?
7. Why does my provider use PPPoE?
8. What is DDNS?
9. When do I need DDNS service?
10. What is DDNS wildcard? Does the Prestige660 support DDNS wildcard?
11. Can the Prestige's SUA handle IPSec packets sent by the IPSec gateway?
12. How do I setup my Prestige for routing IPSec packets over SUA?
13. What is Traffic Shaping?
14. What do the parameters (PCR, SCR, MBS) mean?
15. Why do we perform traffic shaping in the Prestige 660?
16. Which firmware version will support Anti-Virus (Packet Scan)?
17. Does Prestige 660's Anti-Virus support all type of packets scan?
18. What is CAC?
19. What is MBM?
20. Which services are supported in Prestige 660 MBM?

1. How can I manage Prestige 660?

- Menu driven user interface for easy network management Local and remote console management
- Web configurator
- Telnet remote management
- TFTP (Trivial File Transfer Protocol) and FTP firmware upgrade and configuration backup and restore

2. What is the default user name and password to loging web configurator?

The default user name is 'admin' and password is '1234'. You can change the password when loging to web configurator in the Advanced Setup->Password menu.
Please record your new password whenever you change it. The system will lock you out if you have forgotten your password.

3. How do I know the P660's WAN IP address assigned by the ISP?

You can view "My WAN IP <from ISP> : 200.1.1.1" shown in menu 24.1 to check this IP address.

4. What is the microfilter or sipltter used for?

Generally, the voice band uses the lower frequency ranging from 0 to 4KHz, while ADSL data transmission uses the higher frequency. The microfilter acts as a low-pass filter for your telephone set to ensure that ADSL transmissions do not interfere with your voice transmissions. For the details about how to connect the microfilter please refer to the user's manual.

5. The P660 supports Bridge and Router mode, what's the difference between them ?

When the ISP limits some specific computers to access Internet, that means only the traffic to/from these computers will be forwarded and the other will be filtered. In this case, we use bridge mode which works as a ADSL modem to connect to the ISP.. The ISP will generally give one Internet account and limit only one computer to access the Internet.
For most Internet users having multiple computers want to share an Internet account for Internet access, they have to add another Internet sharing device, like a router. In this case, we use the router mode which works as a general Router plus a 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 Prestige 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 Prestige 660 to reach our internal server. It is inconvenient for the users if this IP is dynamic. With DDNS supported by the Prestige 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 Prestige 660.

When the ISP assigns the Prestige 660 a new IP, the Prestige 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 Prestige 660 sends this IP to the DDNS server for its updates.

10. What is DDNS wildcard? Does the Prestige 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 Prestige 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.

11. Can the Prestige's SUA handle IPSec packets sent by the IPSec gateway?

Yes, the Prestige's SUA can handle IPSec ESP Tunneling mode. We know when packets go through SUA, SUA will change the source IP address and source port for the host. To pass IPSec packets, SUA must understand the ESP packet with protocol number 50, replace the source IP address of the IPSec gateway to the router's WAN IP address. However, SUA should not change the source port of the UDP packets which are used for key managements. Because the remote gateway checks this source port during connections, the port thus is not allowed to be changed.

12. How do I setup my Prestige for routing IPSec packets over SUA?

For outgoing IPSec tunnels, no extra setting is required.

For forwarding the inbound IPSec ESP tunnel, A 'Default' server set in menu 15.2.1 is required. It is because SUA makes your LAN appear as a single machine to the outside world. LAN users are invisible to outside users. So, to make an internal server for outside access, we must specify the service port and the LAN IP of this server in Menu 15. Thus SUA is able to forward the incoming packets to the requested service behind SUA and the outside users access the server using the Prestige's WAN IP address. So, we have to configure the internal IPsec as a default server (unspecified service port) in menu 15.2.1 when it acts a server gateway.

13. What is Traffic Shaping?

Traffic Shaping is a feature in the Prestige. It allocates the bandwidth to WAN dynamically and aims at boosting the efficiency of the bandwidth. If there are serveral VCs in the Prestige but only one VC activated at one time, the Prestige allocates all the Bandwidth to the VC and the VC gets full bandwidth. If another VCs are avtivated later, the bandwidth is yield to other VCs after ward.

14. What do the parameters (PCR, SCR, MBS) mean?

Traffic shaping parameters (PCR, SCR, MBS) can be set in Menu 4 and Menu 11.6 and is valid for both incoming and outgoing direction since G.shdsl is symmetric.
Peak Cell Rate(PCR): The maximum bandwidth allocated to this connection. The VC connection throughput is limited by PCR.
Sustainable Cell Rate(SCR): The least guaranteed bandwidth of a VC. When there are multi-VCs on the same line, the VC throughput is guaranteed by SCR.
Maximum Burst Size(MBS): The amount of cells transmitted through this VC at the Peak Cell Rate before yielding to other VCs. Total bandwidth of the line is dedicated to single VC if there is only one VC on the line. However, as the other VC asking the bandwidth, the MBS defines the maximum number of cells transmitted via this VC with Peak Cell rate before yielding to other VCs.

The Prestige 660 holds the parameters for shaping the traffic among its virtual channels. If you do not need traffic shaping, please set SCR = 0, MBS = 0 and PCR as the maximum value according to the line rate (for example, 2.3 Mbps line rate will result PCR as 5424 cell/sec.)

15.Why do we perform traffic shaping in the Prestige 660?

The Prestige 660 must manage traffic fairly and provide bandwidth allocation for different sorts of applications, such as voice, video, and data. All applications have their own natural bit rate. Large data transactions have a fluctuating natural bit rate. The Prestige 660 is able to support variable traffic among different virtual connections. Certain traffic may be discard if the virtual connection experiences congestion. Traffic shaping defines a set of actions taken by the Prestige 660 to avoid congestion; traffic shaping takes measures to adapt to unpredictable fluctuations in traffic flows and other problems among virtual connections.

16.Which firmware version support Anti-Virus (Packet Scan)?

The Anti-Virus support will start in the firmware version v3.40(QR4)C0.

17. Does Prestige 660's Anti-Virus support all type of packets scan?

At the mean time of the support notes updated, Prestige 660 support FTP, HTP, SMTP, and POP3 network scanning.

- Support downstream packets scanning for FTP, HTP, and POP3 network protocol.
- Support upstream packets scanning for SMTP network protocol.

However, Prestige 660 doesn't support compression file scanning (ex ZIP, RAR) and multi-session download (ex. flashGet). For the further enhancement, please refer to the latest release notes.

18. What is CAC?

Content Access Control (CAC) provides ability to manage each user host for internet access. Through CAC, network administrator can arrange the time schedule of internet access, set up which network service can be used and manage which web site can be browsed for each group user.

19. What is MBM?

Media Bandwidth Management (MBM) is for user to control the QoS for different services but the configurations of MBM is too complicated to end-users. So, we develop MBM Wizard to reduce the loading of user configurations.

20

. Which services are supported in Prestige 660 MBM?

At the mean time of this support notes updated, Prestige 660 just support 6 services which include XBOX, VoIP(SIP), FTP, Email, eMule, WWW.

All contents copyright (c) 2002 ZyXEL Communications Corporation.