ZyWALL 70 Support Notes
5
B12. Can I downgrade a ZyWALL 5 or ZyWALL 35 running ZyNOS
v4.00 back to ZyNOS v3.64 (or below)?.................................................260
C. Turbo Card FAQ............................................................................................260
C01. Can I insert the ZyWALL Turbo Card & wireless card
simultaneously into ZyWALL 5, ZyWALL 35 or ZyWALL 70?..........260
C02. Except ZyWALL Turbo Card is a must when use AV+IDP service,
what exactly I can get benefit from it?...................................................260
C03. Do I must have a ZyWALL Turbo Card inserted if I upgraded to
ZyNOS v4.00? If not, when must I insert a ZyWALL Turbo Card into
my ZyWALL device? ...............................................................................260
D. Firewall FAQ.................................................................................................261
D01. What is a network firewall?...........................................................261
D02. What makes ZyWALL secure? ......................................................261
D03. What are the basic types of firewalls?...........................................261
D04. What kind of firewall is the ZyWALL?.........................................262
D05. Why do you need a firewall when your router has packet
filtering and NAT built-in?......................................................................262
D06. What is Denials of Service (DoS)attack?.......................................262
D07. What is Ping of Death attack? .......................................................263
D08. What is Teardrop attack?...............................................................263
D09. What is SYN Flood attack?............................................................263
D10. What is LAND attack? ...................................................................263
D11. What is Brute-force attack? ...........................................................264
D12. What is IP Spoofing attack?...........................................................264
D13. What are the default ACL firewall rules in ZyWALL?...............264
D14. In ZyWALL, is DMZ behind NAT or not? ...................................264
D15. Can I use both public and private IP addresses on DMZ?..........265
D16. Why does traffic redirect/static/policy route be blocked by
ZyWALL?.................................................................................................265
D17. How can I protect against IP spoofing attacks? ...........................267
E. Security Service licenses FAQ ......................................................................268
E01. What is iCard?.................................................................................268
E02. Where can I buy the iCard and how much does it cost? .............268
E03. How many kinds of iCard does ZyXEL provide? ........................268
E04. Is each type of iCard device specific?............................................268
E05. What are the available security service licenses which require
additional purchase and license activation in ZyNOS v4.00?..............268
E06. What kind of iCard should I buy?.................................................268
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