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P-870HW-I1 User’s Guide
Chapter 11 Firewalls
153
3
The reply from the WAN goes to the ZyXEL Device.
4
The ZyXEL Device then sends it to the computer on the LAN in Subnet 1.
Figure 84
IP Alias
11.3 Guidelines for Enhancing Security with Your Firewall
• Change the default password via CLI (Command Line Interpreter) or web configurator.
• Limit who can telnet into your router.
• Don't enable any local service (such as SNMP or NTP) that you don't use. Any enabled
service could present a potential security risk. A determined hacker might be able to find
creative ways to misuse the enabled services to access the firewall or the network.
• For local services that are enabled, protect against misuse. Protect by configuring the
services to communicate only with specific peers, and protect by configuring rules to
block packets for the services at specific interfaces.
• Protect against IP spoofing by making sure the firewall is active.
• Keep the firewall in a secured (locked) room.
11.3.1 Security In General
You can never be too careful! Factors outside your firewall, filtering or NAT can cause
security breaches. Below are some generalizations about what you can do to minimize them.
• Encourage your company or organization to develop a comprehensive security plan.
Good network administration takes into account what hackers can do and prepares
against attacks. The best defense against hackers and crackers is information. Educate all
employees about the importance of security and how to minimize risk. Produce lists like
this one!
• DSL or cable modem connections are “always-on” connections and are particularly
vulnerable because they provide more opportunities for hackers to crack your system.
Turn your computer off when not in use.
• Never give out a password or any sensitive information to an unsolicited telephone call or
e-mail.
Содержание P-870HW-I Series
Страница 1: ...P 870HW I Series 802 11g Wireless VDSL2 4 port Gateway User s Guide Version 3 50 8 2006 Edition 1...
Страница 2: ......
Страница 7: ...P 870HW I1 User s Guide Safety Warnings 7 This product is recyclable Dispose of it properly...
Страница 30: ...P 870HW I1 User s Guide 30 List of Figures...
Страница 36: ...P 870HW I1 User s Guide 36 List of Tables...
Страница 46: ...P 870HW I1 User s Guide 46 Chapter 1 Getting To Know Your ZyXEL Device...
Страница 54: ...P 870HW I1 User s Guide 54 Chapter 2 Introducing the Web Configurator...
Страница 76: ...P 870HW I1 User s Guide 76 Chapter 3 Connection Wizard...
Страница 92: ...P 870HW I1 User s Guide 92 Chapter 5 Status Screen...
Страница 114: ...P 870HW I1 User s Guide 114 Chapter 6 Wireless LAN...
Страница 115: ...P 870HW I1 User s Guide Chapter 6 Wireless LAN 115...
Страница 116: ...P 870HW I1 User s Guide 116 Chapter 6 Wireless LAN...
Страница 117: ...P 870HW I1 User s Guide Chapter 6 Wireless LAN 117...
Страница 118: ...P 870HW I1 User s Guide 118 Chapter 6 Wireless LAN...
Страница 126: ...P 870HW I1 User s Guide 126 Chapter 7 WAN...
Страница 146: ...P 870HW I1 User s Guide 146 Chapter 10 NAT...
Страница 158: ...P 870HW I1 User s Guide 158 Chapter 11 Firewalls Figure 87 Security Firewall Rules Edit...
Страница 168: ...P 870HW I1 User s Guide 168 Chapter 12 Content Filter...
Страница 196: ...P 870HW I1 User s Guide 196 Chapter 14 Static Route...
Страница 200: ...P 870HW I1 User s Guide 200 Chapter 15 Bandwidth MGMT Figure 112 Management Bandwidth MGMT Configuration...
Страница 228: ...P 870HW I1 User s Guide 228 Chapter 17 UPnP...
Страница 236: ...P 870HW I1 User s Guide 236 Chapter 18 System...
Страница 245: ...P 870HW I1 User s Guide Chapter 20 Tools 245 Figure 152 Restart Screen Click Restart to have the ZyXEL Device reboot...
Страница 246: ...P 870HW I1 User s Guide 246 Chapter 20 Tools...
Страница 256: ...P 870HW I1 User s Guide 256 Chapter 22 General Setup...
Страница 258: ...P 870HW I1 User s Guide 258 Chapter 23 WAN Setup...
Страница 266: ...P 870HW I1 User s Guide 266 Chapter 24 LAN Setup...
Страница 286: ...P 870HW I1 User s Guide 286 Chapter 29 NAT Setup...
Страница 304: ...P 870HW I1 User s Guide 304 Chapter 30 Filter Setup...
Страница 306: ...P 870HW I1 User s Guide 306 Chapter 31 Firewall Setup...
Страница 308: ...P 870HW I1 User s Guide 308 Chapter 32 SNMP Configuration...
Страница 332: ...P 870HW I1 User s Guide 332 Chapter 35 System Maintenance 24 5 24 7...
Страница 346: ...P 870HW I1 User s Guide 346 Chapter 37 IP Routing Policy Setup...
Страница 362: ...P 870HW I1 User s Guide 362 Chapter 39 Troubleshooting Figure 242 Security Setting ActiveX Controls...
Страница 364: ...P 870HW I1 User s Guide 364 Appendix A Product Specifications...
Страница 390: ...P 870HW I1 User s Guide 390 Appendix D NAT...
Страница 396: ...P 870HW I1 User s Guide 396 Appendix E Firewall Commands...
Страница 434: ...P 870HW I1 User s Guide 434 Appendix I Services...