ZyXEL Communications P-660HNU-Tx Handbuch

P-660HNU Series Support Notes

P-660HNU-Tx

Wireless N ADSL2+ 4-port Gateway with USB

Support Notes

Version 1.02

Aug. 2011

P-660HNU Series Support Notes

FAQ .................................................................................................................6

System FAQ................................................................................................6

1. What‟s the Embedded Web Configurator?............................................6

2. How do I access the P-660HNU-Tx Command Line Interface (CLI)?...6

3. How do I update the firmware and configuration file?...........................6

4. How do I upgrade the firmware by using Web configurator? ................6

5. How do I restore/backup P-660HNU-Tx configurations by using Web

Configurator?............................................................................................7

6. What should I do if I forget the system password? ...............................8

7. How to use the Reset button?...............................................................8

8. What is SUA? When should I use SUA? ..............................................8

9. Is it possible to access a server running behind SUA from the outside

Internet? How can I do it?.........................................................................9

10. How can I protect against IP spoofing attacks?..................................9

Product FAQ.............................................................................................11

1. How can I manage P-660HNU-Tx? ....................................................11

2. What is the default password for Web Configurator?..........................11

3. How do I know the P-660HNU-Tx's WAN IP address assigned by the

ISP?........................................................................................................11

4. What is the micro filter or splitter used for?.........................................11

5. The P-660HNU-Tx supports Bridge and Router mode, what's the

difference between them? ......................................................................11

6. How do I know I am using PPPoE?....................................................12

7. Why does my provider use PPPoE?...................................................12

8. What is DDNS?...................................................................................12

9. When do I need DDNS service?.........................................................13

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

wildcard?.................................................................................................13

11. What is Traffic Shaping?...................................................................13

12. Why do we perform traffic shaping in the P-660HNU-Tx?................13

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

14. What do the ATM QoS Types (CBR, UBR, VBR-nRT, VBR-RT) mean?

................................................................................................................14

ADSL FAQ.................................................................................................15

1. How does ADSL compare to Cable modems?....................................15

2. What is the expected throughput?......................................................15

3. What is the microfilter used for? .........................................................15

4. How do I know the ADSL line is up?...................................................15

5. How does the P-660HNU-Tx work on a noisy ADSL? ........................15

6. Does the VC-based multiplexing perform better than the LLC-based

multiplexing?...........................................................................................16

7. How do I know the details of my ADSL line statistics?........................16

8. What are the signaling pins of the ADSL connector?..........................16

9. What is port binding?..........................................................................16

P-660HNU Series Support Notes

Firewall FAQ .............................................................................................18

General ..................................................................................................18

1. What is a network firewall?.................................................................18

2. What makes P-660HNU-Tx secure?...................................................18

3. What are the basic types of firewalls? ................................................18

4. Why do you need a firewall when your router has packet filtering and

NAT built-in?...........................................................................................19

5. What is Denials of Service (DoS) attack?...........................................19

6. What is Ping of Death attack?.............................................................19

7. What is Teardrop attack?....................................................................19

8. What is SYN Flood attack?.................................................................20

9. What is LAND attack?.........................................................................20

10 What is Brute-force attack?................................................................20

11. What is IP Spoofing attack?..............................................................20

12. What are the default ACL firewall rules in P-660HNU-Tx?................21

Configuration ..........................................................................................21

1. How do I active the firewall?...............................................................21

2. How do I prevent others from configuring my firewall? .......................21

3. Why can't I access my P-660HNU-Tx using Web Configurator/Telnet

over WAN? .............................................................................................21

Wireless FAQ............................................................................................23

General FAQ..........................................................................................23

1. What is a Wireless LAN?....................................................................23

2. What are the advantages of Wireless LAN?.......................................23

3. What is the disadvantage of Wireless LAN?.......................................23

4. Where can you find 802.11 wireless networks?..................................24

5. What is an Access Point?...................................................................24

6. Is it possible to use wireless products from a variety of vendors? ......24

7. What is Wi-Fi? ....................................................................................24

8. What types of devices use the 2.4GHz Band?....................................24

9. Does the 802.11 interfere with Bluetooth device?...............................25

10. Can radio signals pass through wall? ...............................................25

11. What are potential factors that may causes interference among WLAN

products?................................................................................................25

12. What's the difference between a WLAN and a WWAN?...................26

13. Can I manually swap the wireless module without damage any

hardware?...............................................................................................26

14. What wireless security mode does P-660HNU-Tx support?.............26

15. What Wireless standard does P-660HNU-Txsupport?......................26

16. Does P-660HNU-Tx support WLAN MAC filtering?..........................26

17. Does P-660HNU-Tx support auto rate adaption?.............................26

Advanced FAQ......................................................................................27

1. What is Ad Hoc mode?.......................................................................27

2. What is Infrastructure mode?..............................................................27

P-660HNU Series Support Notes

3. How many Access Points are required in a given area?.....................27

4. What is Direct-Sequence Spread Spectrum Technology –(DSSS)?..27

5. What is Frequency-hopping Spread Spectrum Technology –(FHSS)?

................................................................................................................27

6. Do I need the same kind of antenna on both sides of a link? .............28

7. Why the 2.4 GHZ Frequency range?..................................................28

8. What is Server Set ID (SSID)?............................................................28

9. What is an ESSID?.............................................................................28

Security FAQ.............................................................................................28

1. How do I secure the data across the P-660HNU-Tx Access Point's radio

link?........................................................................................................28

2. What is WEP?.....................................................................................29

3. What is WPA-PSK?............................................................................29

4. What is the difference between 40-bit and 64-bit WEP?.....................29

5. What is a WEP key?...........................................................................29

6. Will 128-bit WEP communicates with 64-bit WEP? ............................29

7. Can the SSID be encrypted?..............................................................29

8. By turning off the broadcast of SSID, can someone still sniff the SSID?

................................................................................................................30

9. What are Insertion Attacks?................................................................30

10. What is Wireless Sniffer?..................................................................30

Application Notes ........................................................................................31

General Application Notes.......................................................................31

1. Internet Access Using P-660HNU-Tx under Bridge mode..................31

2. Internet Access Using P-660HNU-Tx under Routing mode................34

3. 3G backup ..........................................................................................37

4. SUA Notes..........................................................................................42

5. Using the Dynamic DNS (DDNS)........................................................49

6. QoS ....................................................................................................50

7. Network Management Using SNMP...................................................52

8. SSH....................................................................................................55

9. Using IP Alias .....................................................................................55

10. Using IP Multicast.............................................................................56

11. How to configure filter rules on P-660HNU-Tx?................................57

12. Change WAN MTU via WEB-GUI.....................................................60

13. Manage CPE via TR-069..................................................................61

14. USB sharing......................................................................................63

Wireless Application Notes.....................................................................67

1. Configure a Wireless Client to Ad hoc mode ......................................67

2. MAC Filter...........................................................................................73

3. Setup WEP (Wired Equivalent Privacy)..............................................76

4. Site Survey .........................................................................................80

5. Configure WPA(2)-PSK ......................................................................83

6. The WPS/WLAN Button......................................................................87

P-660HNU Series Support Notes

Support Tool.................................................................................................88

1. Upgrading Firmware via Web GUI......................................................88

2. Backing –up the Configuration...........................................................88

3. Uploading Configuration via Web GUI................................................89

P-660HNU Series Support Notes

FAQ

System FAQ

1. What‟sthe Embedded Web Configurator?

The web configurator is an HTML-based management interface that allows

easy device setup and management via Internet browser.

2. How do I access the P-660HNU-Tx Command Line Interface (CLI)?

The Command Line Interface is for the Administrator use only, and it could be

accessed via telnet session.

Note: It is protected by super password, admin/1234 by factory default.

3. How do I update the firmware and configuration file?

You can do this if you access the P-660HNU-Tx (x here stands for 1 or 3) as

Administrator. You can upload the firmware and configuration file to Prestige

from Web Configurator. Note: There may be firmware that could not be

upgraded from Web Configurator. In this case, ZyXEL will prepare

special Upload Software for you. Please read the firmware release note

carefully when you want to upload a new firmware.

4. How do I upgrade the firmware by using Web configurator?

The P-660HNU-Tx allows you to transfer the firmware to P-660HNU-Tx using

Web Configurator. The procedure for uploading firmware via Web Configurator

is as follows.

a. Type „http://192.168.1.1‟in the web browser URL box in your PC to

Note: The factory default LAN IP is 192.168.1.1.

b. Login with the administrator account. admin/1234 by default.

P-660HNU Series Support Notes

c. To upgrade firmware, you can do it in Web Configurator, Advanced

Setup, Maintenance -> Tools -> Firmware. After data transfer is

finished, the P-660HNU-Tx will program the upgraded firmware into

FLASH ROM and reboot itself.

5. How do I restore/backup P-660HNU-Tx configurations by using Web

Configurator?

a. Log into your P-660HNU-Tx using Web Configurator. Please refer to the

step a & b above.

b. To backup the P-660HNU-Tx configurations, you can click Backup in

the page Maintenance -> Tools -> Configuration.

c. To restore the P-660HNU-Tx configurations, you can type the file path

or click Browser to look for one, and then click Upload.

P-660HNU Series Support Notes

6. What should I do if I forget the system password?

In case you forget the system password, you can erase the current

configuration and restore factory defaults this way:

Use the RESET button of P-660HNU-Tx to reset the router. After the router is

reset, the LAN IP address will be reset to '192.168.1.1', the common user

username will be reset to 'user', there is no password for common user

account, the Administrator username/password will be reset to „admin/1234‟.

7. How to use the Reset button?

a. Turn your P-660HNU-Tx on. Make sure the POWER led is on (not

blinking)

b. Press the RESET button for ten seconds and then release it. If the

POWER LED begins to blink, the default configuration has been

restored and the P-660HNU-Tx restarts.

8. What is SUA? When should I use SUA?

SUA (Single User Account) is a unique feature supported by Prestige router

which allows multiple people to access Internet concurrently for the cost of a

single user account.

When Prestige acting as SUA receives a packet from a local client destined for

the outside Internet, it replaces the source address in the IP packet header

with its own address and the source port in the TCP or UDP header with

another value chosen out of a local pool. It then recomputes the appropriate

header checksums and forwards the packet to the Internet as if it is originated

P-660HNU Series Support Notes

from Prestige using the IP address assigned by ISP. When reply packets from

the external Internet are received by Prestige, the original IP source address

and TCP/UDP source port numbers are written into the destination fields of the

packet (since it is now moving in the opposite direction), the checksums are

recomputed, and the packet is delivered to its true destination. This is because

SUA keeps a table of the IP addresses and port numbers of the local systems

currently using it.

By fatory default, the NAT is select as SUA in Web Configurator, Advanced

Setup, Network -> NAT -> General -> NAT Setup.

9. Is it possible to access a server running behind SUA from the outside

Internet? How can I do it?

Yes, it is possible because P-660HNU-Tx delivers the packet to the local

server by looking up to a SUA server table. Therefore, to make a local server

accessible to the outside users, the port number and the inside IP address of

the server must be configured. (You can configure it in Web Configurator,

Advanced Setup, Network -> NAT -> Port Forwarding).

10. How can I protect against IP spoofing attacks?

The P-660HNU-Tx's filter sets provide a means to protect against IP spoofing

attacks. The basic scheme is as follows:

For the input data filter:

Deny packets from the outside that claim to be from the inside

Allow everything that is not spoofing us

Filter rule setup: Filter type =TCP/IP Filter Rule

Active =Yes

Source IP Addr =a.b.c.d

Source IP Mask =w.x.y.z

Action Matched =Drop

Action Not Matched =Forward

Where a.b.c.d is an IP address on your local network and w.x.y.z is your

netmask:

For the output data filters:

Deny bounce back packet

Allow packets that originate from us

P-660HNU Series Support Notes

Filter rule setup:

Filter Type =TCP/IP Filter Rule

Active =Yes

Destination IP Addr =a.b.c.d

Destination IP Mask =w.x.y.z

Action Matched =Drop

Action No Matched =Forward

Where a.b.c.d is an IP address on your local network and w.x.y.z is your

netmask.

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