ZyXEL Communications ADSL2+ 4-port Security Gateway Support Notes page 3

17. What do the ATM QoS Types (CBR, UBR, VBR-nRT, VBR-RT) mean?
................................................................................................................15
18. What is content filter? .......................................................................15
ADSL FAQ .................................................................................................17
1. How does ADSL compare to Cable modems?....................................17
2. What is the expected throughput? ......................................................17
3. What is the microfilter used for? .........................................................17
4. How do I know the ADSL line is up?...................................................17
5. How does the P-662H-D work on a noisy ADSL?...............................17
6. Does the VC-based multiplexing perform better than the LLC-based
multiplexing?...........................................................................................18
7. How do I know the details of my ADSL line statistics?........................18
8. What are the signaling pins of the ADSL connector?..........................18
9. What is triple play? .............................................................................18
Firewall FAQ .............................................................................................20
General ...................................................................................................20
1. What is a network firewall?...................................................20
2. What makes P-662H-D secure? ...........................................20
3. What are the basic types of firewalls? ..................................20
4. What kind of firewall is the P-662H-D? .................................21
5. Why do you need a firewall when your router has packet
filtering and NAT built-in? .........................................................21
6. What is Denials of Service (DoS) attack?.............................21
7. What is Ping of Death attack? ..............................................22
8. What is Teardrop attack? .....................................................22
9. What is SYN Flood attack?...................................................22
10. What is LAND attack? ........................................................22
11 What is Brute-force attack? .................................................23
12. What is IP Spoofing attack? ...............................................23
13. What are the default ACL firewall rules in P-662H-D?........23
Configuration ..........................................................................................23
1. How do I configure the firewall? ...........................................23
2. How do I prevent others from configuring my firewall? .........23
3. Why can't I configure my P-662H-D using Web
Configurator/Telnet over WAN? ...............................................24
4. Why can't I upload the firmware and configuration file using
FTP over WAN? .......................................................................25
Log and Alert ..........................................................................................26
1. When does the P-662H-D generate the firewall log?............26
2. What does the log show to us? ............................................26
3. How do I view the firewall log? .............................................26
4. When does the P-662H-D generate the firewall alert? .........27
5. What is the difference between the log and alert?................27
VPN FAQ ...................................................................................................28
All contents copyright © 2006 ZyXEL Communications Corporation.
P-662H-D Series Support Notes
2