ZyXEL Communications Prestige P-662HW-61 Manuals

Manuals and User Guides for ZyXEL Communications Prestige P-662HW-61. We have 6 ZyXEL Communications Prestige P-662HW-61 manuals available for free PDF download: User Manual, Release Note, Quick Start Manual, Specifications, Declaration Of Conformity

ZyXEL Communications Prestige P-662HW-61 User Manual

ZyXEL Communications Prestige P-662HW-61 User Manual (561 pages)

802.11g Wireless ADSL2+ 4-Port Security Gateway

Brand: ZyXEL Communications | Category: Gateway | Size: 23.87 MB

Table of Contents

Copyright

2
Federal Communications Commission (FCC) Interference Statement

3
Zyxel Limited Warranty

4
Customer Support

5
Table of Contents

8
List of Figures

26
List of Tables

34
Preface

40
Introduction to DSL

42
Chapter 1 Getting to Know Your Prestige

44
- Introducing the Prestige
  44
Chapter 2 Introducing the Web Configurator

54
- Web Configurator Overview
  54
Chapter 3 Wizard Setup for Internet Access

60
- Introduction
  60
  - Encapsulation
    60
    
    Enet Encap
    60
    
    PPP over Ethernet
    60
    
    Pppoa
    60
    
    Rfc 1483
    61
  - Multiplexing
    61
    
    VC-Based Multiplexing
    61
    
    LLC-Based Multiplexing
    61
  - VPI and VCI
    61
  - Internet Access Wizard Setup: First Screen
    61
- IP Address and Subnet Mask
  62
Chapter 4 Wizard Setup for Media Bandwidth Management

72
Chapter 5 Password Setup

76
- Password Overview
  76
  - Configuring Password
    76
  - Figure 18 Password
    76
  - Table 13 Password
    76
Chapter 6 LAN Setup

78
- LAN Overview
  78
  - Lans, Wans and the Prestige
    78
  - Figure 19 LAN and WAN IP Addresses
    78
- DNS Server Address
  79
- DNS Server Address Assignment
  79
- Lan Tcp/Ip
  80
  - Factory LAN Defaults
    80
  - IP Address and Subnet Mask
    80
  - RIP Setup
    80
  - Multicast
    81
- Any IP
  81
  - How any IP Works
    82
  - Figure 20 any IP Example
    82
- Configuring LAN
  83
- Figure 21 LAN Setup
  83
- Configuring Static DHCP
  84
- Table 14 LAN Setup
  84
- Figure 22 LAN: Static DHCP
  85
- Table 15 LAN: Static DHCP
  85
Chapter 7 DMZ

86
- Introduction
  86
- Configuring DMZ
  86
- Figure 23 DMZ
  87
- Table 16 DMZ
  87
Chapter 8 Wireless LAN Setup

90
- Introduction
  90
  - Additional Installation Requirements for Using 802.1X
    90
  - Channel
    90
  - Ess ID
    91
  - Rts/Cts
    91
  - Figure 24 RTS/CTS
    91
  - Fragmentation Threshold
    92
- Levels of Security
  92
- Data Encryption with WEP
  93
- Configuring Wireless LAN
  93
- Figure 25 Prestige Wireless Security Levels
  93
- Figure 26 Wireless LAN
  94
- Table 17 Wireless LAN
  94
- Configuring MAC Filter
  95
- Figure 27 MAC Address Filter
  96
- Table 18 MAC Address Filter
  96
- Network Authentication
  97
  - Eap
    97
    
    Radius
    97
    
    Types of RADIUS Messages
    97
  - EAP Authentication Overview
    98
  - Figure 28 EAP Authentication
    98
- Introduction to WPA
  99
  - User Authentication
    99
  - Encryption
    99
- WPA-PSK Application Example
  100
- WPA with RADIUS Application Example
  100
- Figure 29 WPA - PSK Authentication
  100
- Security Parameters Summary
  101
- Figure 30 WPA with RADIUS Application Example
  101
- Table 19 Wireless Security Relational Matrix
  101
- Wireless Client WPA Supplicants
  102
- Configuring 802.1X and WPA
  102
- Configuring Local User Authentication
  108
- Figure 35 Local User Database
  108
- Configuring RADIUS
  109
- Figure 36 RADIUS
  109
- Table 24 Local User Database
  109
- Table 25 RADIUS
  110
Chapter 9 WAN Setup

112
- WAN Overview
  112
- Metric
  112
- Pppoe Encapsulation
  113
- Traffic Shaping
  113
- Zero Configuration Internet Access
  114
- Configuring WAN Setup
  114
- Figure 37 Example of Traffic Shaping
  114
- Figure 38 WAN Setup (Pppoe)
  115
- Table 26 WAN Setup
  115
- Traffic Redirect
  117
- Configuring WAN Backup
  118
- Figure 39 Traffic Redirect Example
  118
- Figure 40 Traffic Redirect LAN Setup
  118
- Figure 41 WAN Backup
  119
- Table 27 WAN Backup
  119
- Configuring Advanced WAN Backup
  121
- Figure 42 Advanced WAN Backup
  121
- Table 28 Advanced WAN Backup
  122
- AT Command Strings
  124
- DTR Signal
  124
- Response Strings
  124
- Configuring Advanced Modem Setup
  124
- Figure 43 Advanced Modem Setup
  125
- Table 29 Advanced Modem Setup
  125
Chapter 10 Network Address Translation (NAT) Screens

128
- NAT Overview
  128
  - NAT Definitions
    128
  - Table 30 NAT Definitions
    128
  - What NAT Does
    129
  - How NAT Works
    129
  - NAT Application
    130
  - NAT Mapping Types
    130
  - Figure 44 How NAT Works
    130
  - Figure 45 NAT Application with IP Alias
    130
- SUA (Single User Account) Versus NAT
  131
- Table 31 NAT Mapping Types
  131
- SUA Server
  132
- Selecting the NAT Mode
  133
- Figure 46 Multiple Servers Behind NAT Example
  133
- Configuring SUA Server
  134
- Figure 47 NAT Mode
  134
- Table 33 NAT Mode
  134
- Figure 48 Edit SUA/NAT Server Set
  135
- Table 34 Edit SUA/NAT Server Set
  135
- Configuring Address Mapping
  136
- Figure 49 Address Mapping Rules
  136
- Table 35 Address Mapping Rules
  136
- Editing an Address Mapping Rule
  137
- Figure 50 Address Mapping Rule Edit
  137
- Table 36 Address Mapping Rule Edit
  138
Chapter 11 Dynamic DNS Setup

140
- Dynamic DNS
  140
  - DYNDNS Wildcard
    140
- Configuring Dynamic DNS
  140
- Figure 51 Dynamic DNS
  141
- Table 37 Dynamic DNS
  141
Chapter 12 Time and Date

142
- Configuring Time and Date
  142
- Figure 52 Time and Date
  142
- Table 38 Time and Date
  143
Chapter 13 Firewalls

144
- Firewall Overview
  144
- Types of Firewalls
  144
  - Packet Filtering Firewalls
    144
  - Application-Level Firewalls
    144
  - Stateful Inspection Firewalls
    145
- Introduction to Zyxel's Firewall
  145
  - Denial of Service Attacks
    146
- Denial of Service
  146
  - Basics
    146
  - Figure 53 Prestige Firewall Application
    146
  - Types of Dos Attacks
    147
    
    Table 39 Common IP Ports
    147
    
    Figure 54 Three-Way Handshake
    148
    
    Figure 55 SYN Flood
    148
    
    Figure 56 Smurf Attack
    149
    
    ICMP Vulnerability
    149
    
    Illegal Commands (Netbios and SMTP)
    149
    
    Table 40 ICMP Commands that Trigger Alerts
    149
    
    Table 41 Legal Netbios Commands
    149
    
    Traceroute
    150
- Stateful Inspection
  150
  - Table 42 Legal SMTP Commands
    150
  - Figure 57 Stateful Inspection
    151
  - Stateful Inspection Process
    151
  - Stateful Inspection and the Prestige
    152
  - TCP Security
    152
  - UDP/ICMP Security
    153
  - Upper Layer Protocols
    153
- Guidelines for Enhancing Security with Your Firewall
  154
  - Security in General
    154
- Packet Filtering Vs Firewall
  155
  - Packet Filtering
    155
    
    When to Use Filtering
    155
  - Firewall
    155
    
    When to Use the Firewall
    156
- Firewall Configuration
  158
  - Access Methods
    158
  - Firewall Policies Overview
    158
Chapter 14 Firewall Configuration

158
- Rule Logic Overview
  159
  - Rule Checklist
    159
  - Security Ramifications
    160
  - Key Fields for Configuring Rules
    160
    
    Action
    160
    
    Service
    160
    
    Source Address
    160
    
    Destination Address
    161
- Connection Direction Example
  161
  - LAN to WAN Rules
    161
  - WAN to LAN Rules
    161
  - Figure 58 LAN to WAN Traffic
    161
  - Alerts
    162
- Configuring Basic Firewall Settings
  162
- Figure 59 WAN to LAN Traffic
  162
- Figure 60 Firewall: Default Policy
  163
- Table 43 Firewall: Default Policy
  163
- Rule Summary
  164
  - Figure 61 Firewall: Rule Summary
    164
  - Table 44 Rule Summary
    164
  - Configuring Firewall Rules
    165
  - Figure 62 Firewall: Edit Rule
    166
  - Table 45 Firewall: Edit Rule
    167
- Customized Services
  168
- Creating/Editing a Customized Service
  168
- Figure 63 Firewall: Customized Services
  168
- Table 46 Customized Services
  168
- Example Firewall Rule
  169
- Figure 64 Firewall: Configure Customized Services
  169
- Table 47 Firewall: Configure Customized Services
  169
- Figure 65 Firewall Example: Rule Summary
  170
- Figure 66 Firewall Example: Edit Rule: Destination Address
  171
- Figure 67 Edit Custom Port Example
  171
- Figure 68 Firewall Example: Edit Rule: Select Customized Services
  172
- Predefined Services
  173
- Figure 69 Firewall Example: Rule Summary: My Service
  173
- Table 48 Predefined Services
  173
- Anti-Probing
  175
- Configuring Attack Alert
  176
  - Figure 70 Firewall: Anti Probing
    176
  - Table 49 Firewall: Anti Probing
    176
  - Half-Open Sessions
    177
    
    TCP Maximum Incomplete and Blocking Time
    177
    
    Figure 71 Firewall: Threshold
    178
    
    Table 50 Firewall: Threshold
    178
  - Threshold Values
    177
Chapter 15 Content Filtering

180
- Content Filtering Overview
  180
- Configuring Keyword Blocking
  180
- Configuring the Schedule
  181
- Figure 72 Content Filter: Keyword
  181
- Table 51 Content Filter: Keyword
  181
- Configuring Trusted Computers
  182
- Figure 73 Content Filter: Schedule
  182
- Table 52 Content Filter: Schedule
  182
- Figure 74 Content Filter: Trusted
  183
- Table 53 Content Filter: Trusted
  183
Chapter 16 Content Access Control

184
Chapter 17 Anti-Virus Packet Scan

204
Chapter 18 Introduction to Ipsec

212
- VPN Overview
  212
  - Ipsec
    212
  - Security Association
    212
  - Other Terminology
    212
    
    Encryption
    212
    
    Data Confidentiality
    213
    
    Data Integrity
    213
    
    Data Origin Authentication
    213
  - VPN Applications
    213
- Ipsec Architecture
  213
  - Figure 90 Encryption and Decryption
    213
  - Ipsec Algorithms
    214
  - Key Management
    214
- Encapsulation
  214
  - Figure 91 Ipsec Architecture
    214
  - Transport Mode
    215
  - Tunnel Mode
    215
- Ipsec and NAT
  215
- Figure 92 Transport and Tunnel Mode Ipsec Encapsulation
  215
- Table 65 VPN and NAT
  216
Chapter 19 VPN Screens

218
- Vpn/Ipsec Overview
  218
- Ipsec Algorithms
  218
  - AH (Authentication Header) Protocol
    218
  - ESP (Encapsulating Security Payload) Protocol
    218
- My IP Address
  219
- Secure Gateway Address
  219
  - Table 66 AH and ESP
    219
  - Dynamic Secure Gateway Address
    220
- VPN Summary Screen
  220
- Figure 93 Ipsec Summary Fields
  220
- Figure 94 VPN Summary
  221
- Table 67 VPN Summary
  221
- Keep Alive
  222
- NAT Traversal
  222
  - NAT Traversal Configuration
    223
  - Remote DNS Server
    223
  - Figure 95 NAT Router between Ipsec Routers
    223
- ID Type and Content
  224
- Pre-Shared Key
  226
- Editing VPN Policies
  226
- Table 71 Mismatching ID Type and Content Configuration Example
  226
- Figure 97 VPN IKE
  227
- Table 72 VPN IKE
  228
- IKE Phases
  231
  - Negotiation Mode
    232
  - Figure 98 Two Phases to Set up the Ipsec SA
    232
  - Diffie-Hellman (DH) Key Groups
    233
  - Perfect Forward Secrecy (PFS)
    233
- Configuring Advanced IKE Settings
  233
- Figure 99 VPN IKE: Advanced Setup
  234
- Table 73 VPN IKE: Advanced Setup
  234
- Manual Key Setup
  236
  - Security Parameter Index (SPI)
    236
- Configuring Manual Key
  237
- Figure 100 VPN: Manual Key
  237
- Table 74 VPN: Manual Key
  238
- Viewing SA Monitor
  240
- Figure 101 VPN: SA Monitor
  240
- Configuring Global Setting
  241
- Figure 102 VPN: Global Setting
  241
- Table 75
  241
- Table 76 VPN: Global Setting
  241
- Telecommuter Vpn/Ipsec Examples
  242
- VPN and Remote Management
  245
- Remote Management Configuration
  246
  - Remote Management Overview
    246
    
    Remote Management Limitations
    246
Chapter 20 Remote Management Configuration

246
- Remote Management and NAT
  247
- System Timeout
  247
- Telnet
  247
- Ftp
  247
- Figure 105 Telnet Configuration on a TCP/IP Network
  247
- Web
  248
- Configuring Remote Management
  248
- Figure 106 Remote Management
  248
- Table 79 Remote Management
  248
Chapter 21 Universal Plug-And-Play (Upnp)

250

Advertisement

ZyXEL Communications Prestige P-662HW-61 User Manual

ZyXEL Communications Prestige P-662HW-61 User Manual (492 pages)

P-662H Series 802.11g ADSL2+ 4-Port Security Gateway

Brand: ZyXEL Communications | Category: Gateway | Size: 11.82 MB

Table of Contents

About this User's Guide

3
Document Conventions

4
Safety Warnings

6
- Table of Contents
  9
Contents Overview

9
Table of Contents

11
List of Figures

23
List of Tables

31
Introduction and Wizards

37
Part I: Introduction and Wizards

37
Chapter 1 Getting to Know Your Zyxel Device

39
Chapter 2 Introducing the Web Configurator

43
- Accessing the Web Configurator
  43
  - Web Configurator Overview
    43
    
    Figure 6 Password Screen
    44
    
    Figure 7 Change Password at Login
    45
    
    Figure 8 Replace Factory Default Certificate
    45
    
    Figure 9 Select a Mode
    46
    
    Figure 10 Web Configurator: Main Screen
    47
    
    Navigating the Web Configurator
    47
    
    Navigation Panel
    47
    
    Table 2 Web Configurator Screens Summary
    47
    
    Status Screen
    50
    
    Figure 11 Status Screen
    51
    
    Table 3 Status Screen
    51
    
    Figure 12 Status: any IP Table
    53
    
    Status: any IP Table
    53
    
    Status: WLAN Status
    53
    
    Table 4 Status: any IP Table
    53
    
    Status: Bandwidth Status
    54
    
    Status: VPN Status
    54
  - Figure 13 Status: WLAN Status
    54
  - Figure 14 Status: Bandwidth Status
    54
  - Table 5 Status: WLAN Status
    54
  - Status: Packet Statistics
    55
- Resetting the Zyxel Device
  46
- Using the Reset Button
  46
- Figure 15 Status: VPN Status
  55
- Table 6 Status: VPN Status
  55
- Figure 16 Status: Packet Statistics
  56
- Table 7 Status: Packet Statistics
  56
- Changing Login Password
  57
- Figure 17 System General
  57
- Table 8 System General: Password
  57
Chapter 3 Wizard Setup for Internet Access

59
Chapter 4 Bandwidth Management Wizard

73
Network

79
- Figure 79 DMZ
  79
Part II: Network

79
- WAN Setup
  81
  - Figure 43 Internet Connection (Pppoe)
    86
    
    Table 21 Internet Connection
    86
    
    Configuring Advanced Internet Connection
    87
    
    Figure 44 Advanced Internet Connection
    88
    
    Table 22 Advanced Internet Connection
    88
    
    Configuring more Connections
    89
    
    Figure 45 more Connections
    90
    
    More Connections Edit
    90
    
    Table 23 more Connections
    90
    
    Figure 46 more Connections Edit
    91
    
    Table 24 more Connections Edit
    91
    
    Configuring more Connections Advanced Setup
    92
    
    Figure 47 more Connections Advanced Setup
    93
    
    Table 25 more Connections Advanced Setup
    93
    
    Configuring WAN Backup
    94
    
    Figure 48 Traffic Redirect Example
    94
    
    Figure 49 Traffic Redirect LAN Setup
    94
    
    Traffic Redirect
    94
    
    Figure 50 WAN Backup Setup
    95
    
    Figure 51 WAN Backup Advanced Setup
    97
    
    Table 27 WAN Backup Advanced Setup
    97
    
    Dial Backup Modem Setup
    99
    
    Figure 52 WAN Dial Backup Modem Setup
    99
    
    Table 28 WAN Dial Backup Modem Setup
    100
    
    LAN Overview
    101
    
    LAN Setup
    101
    
    Lans, Wans and the Zyxel Device
    101
    
    DHCP Setup
    102
    
    DNS Server Address
    102
    
    DNS Server Address Assignment
    102
    
    IP Address and Subnet Mask
    103
    
    Lan Tcp/Ip
    103
    
    Multicast
    104
    
    RIP Setup
    104
    
    Any IP
    105
    
    Configuring LAN IP
    106
    
    Figure 56 Advanced LAN Setup
    107
    
    Table 29 LAN IP
    107
    
    Table 30 Advanced LAN Setup
    107
    
    DHCP Setup
    108
    
    Figure 57 DHCP Setup
    108
    
    LAN Client List
    109
    
    Table 31 DHCP Setup
    109
    
    Figure 58 LAN Client List
    110
    
    LAN IP Alias
    110
    
    Table 32 LAN Client List
    110
    
    Figure 59 Physical Network & Partitioned Logical Networks
    111
    
    Figure 60 LAN IP Alias
    111
    
    Table 33 LAN IP Alias
    112
    
    Wireless Network Overview
    113
    
    MAC Address Filter
    114
    
    Ssid
    114
    
    User Authentication
    114
    
    Wireless Security Overview
    114
    
    Encryption
    115
    
    Additional Wireless Terms
    116
    
    One-Touch Intelligent Security Technology (OTIST)
    116
    
    Quality of Service (Qos)
    116
    
    Wireless Performance Overview
    116
    
    General Wireless LAN Screen
    117
    
    No Security
    118
    
    Figure 63 Wireless: no Security
    119
    
    Table 37 Wireless no Security
    119
    
    Figure 64 Wireless: Static WEP Encryption
    120
    
    Table 38 Wireless: Static WEP Encryption
    120
    
    Figure 65 Wireless: WPA(2)-PSK
    121
    
    Table 40 Wireless: WPA(2)
    123
    
    Table 41 Wireless LAN: Advanced
    124
    
    Wireless LAN Advanced Setup
    124
    
    Enabling OTIST
    125
    
    Otist
    125
    
    Table 42 OTIST
    126
    
    Starting OTIST
    127
    
    Figure 71 OTIST in Progress (AP)
    128
    
    Figure 72 OTIST in Progress (Client)
    128
    
    Figure 73 no AP with OTIST Found
    128
    
    Figure 74 Start OTIST
    128
    
    Figure 75 MAC Address Filter
    129
    
    MAC Filter
    129
    
    Table 43 MAC Address Filter
    129
    
    Table 44 WMM Qos Priorities
    130
    
    WMM Qos
    130
    
    WMM Qos Example
    130
    
    WMM Qos Priorities
    130
    
    Figure 76 Wireless LAN: Qos
    131
    
    Qos Screen
    131
    
    Services
    131
    
    Table 45 Wireless LAN: Qos
    131
    
    Tos (Type of Service) and WMM Qos
    131
    
    Application Priority Configuration
    132
    
    Figure 77 Application Priority Configuration
    132
    
    Table 46 Application Priority Configuration
    132
    
    Multiple SSID (P-662HW-D Models Only)
    133
    
    Figure 78 Multiple SSID Network Example
    134
    
    Multiple SSID Commands
    134
    
    Table 47 Multiple SSID Commands
    134
    
    Multiple SSID Example
    135
    
    Table 48 Multiple SSID Example Configuration
    135
    
    Dmz
    137
  - Table 26 WAN Backup Setup
    95
  - WAN Backup Advanced Screen
    96
  - Wpa(2)-Psk
    120
  - Table 39 Wireless: WPA(2)-PSK
    121
  - WPA(2) Authentication Screen
    122
- Wireless LAN
  113
Chapter 5 WAN Setup

81
- Encapsulation
  81
- WAN Overview
  81
- IP Address Assignment
  82
- Multiplexing
  82
- VPI and VCI
  82
- Metric
  83
- Nailed-Up Connection (PPP)
  83
- Nat
  83
- Figure 42 Example of Traffic Shaping
  84
- Traffic Shaping
  84
- ATM Traffic Classes
  85
- Zero Configuration Internet Access
  85
- Internet Connection
  86
- Figure 80 DMZ Public Address Example
  139
- Table 49 DMZ
  139
Chapter 6 LAN Setup

101
- Figure 53 LAN and WAN IP Addresses
  101
- Figure 54 any IP Example
  105
- Figure 55 LAN IP
  106
- Configuring Advanced LAN Setup
  107
- Figure 66 Wireless: WPA(2)
  122
- Figure 67 Advanced
  124
- Figure 68 OTIST
  126
- Figure 69 Example Wireless Client OTIST Screen
  127
- Figure 70 Security Key
  127
- Notes on OTIST
  128
Chapter 7 Wireless LAN

113
Chapter 8 DMZ

137
- Configuring DMZ
  137
- Introduction
  137
- DMZ Public IP Address Example
  139
Chapter 9 Network Address Translation (NAT) Screens

141
- NAT Definitions
  141
  - NAT Overview
    141
    
    Table 50 NAT Definitions
    141
    
    Figure 81 How NAT Works
    142
    
    How NAT Works
    142
    
    NAT Application
    142
    
    What NAT Does
    142
    
    Figure 82 NAT Application with IP Alias
    143
    
    NAT General Setup
    144
    
    SUA (Single User Account) Versus NAT
    144
    
    Table 51 NAT Mapping Types
    144
    
    Figure 83 NAT General
    145
    
    Port Forwarding
    145
    
    Table 52 NAT General
    145
    
    Figure 84 Multiple Servers Behind NAT Example
    146
    
    Configuring Port Forwarding
    147
    
    Figure 85 NAT Port Forwarding
    147
    
    Figure 86 Port Forwarding Rule Setup
    148
    
    Table 54 Port Forwarding Rule Setup
    148
    
    Address Mapping
    149
    
    Figure 87 Address Mapping Rules
    149
    
    Address Mapping Rule Edit
    150
    
    Figure 88 Edit Address Mapping Rule
    150
    
    Table 55 Address Mapping Rules
    150
    
    Trigger Port
    151
  - NAT Mapping Types
    143
  - Table 53 NAT Port Forwarding
    147
  - Port Forwarding Rule Edit
    148
- Configuring Servers Behind Port Forwarding (Example)
  146
- Default Server IP Address
  146
- Port Forwarding: Services and Port Numbers
  146
- Table 56 Edit Address Mapping Rule
  151
- Figure 89 Trigger Port
  152
- Table 57 Trigger Port
  152
- Edit Trigger Port
  153
- Figure 90 Trigger Port Edit
  153
- Table 58 Trigger Port Edit
  153
Security

155
Part III: Security

155
Chapter 10 Firewalls

157
- Firewall Overview
  157
- Firewalls
  157
  - Packet Filtering Firewalls
    157
    
    Types of Firewalls
    157
    
    Application-Level Firewalls
    158
    
    Introduction to Zyxel's Firewall
    158
    
    Stateful Inspection Firewalls
    158
    
    Basics
    159
    
    Denial of Service
    159
    
    Denial of Service Attacks
    159
    
    Figure 91 Firewall Application
    159
    
    Table 59 Common IP Ports
    159
    
    Figure 92 Three-Way Handshake
    160
    
    Table 60 ICMP Commands that Trigger Alerts
    162
    
    Table 61 Legal Netbios Commands
    162
    
    Table 62 Legal SMTP Commands
    162
    
    Figure 95 Stateful Inspection
    163
    
    Stateful Inspection and the Zyxel Device
    164
    
    TCP Security
    164
    
    UDP/ICMP Security
    165
    
    Upper Layer Protocols
    165
    
    Guidelines for Enhancing Security with Your Firewall
    166
    
    Security in General
    166
    
    Firewall
    167
    
    Packet Filtering
    167
    
    Packet Filtering Vs Firewall
    167
  - Stateful Inspection Process
    163
- Types of Dos Attacks
  160
- Figure 93 SYN Flood
  161
- Figure 94 Smurf Attack
  161
- Stateful Inspection
  162
Chapter 11 Firewall Configuration

169
- Access Methods
  169
  - Firewall Policies Overview
    169
    
    Rule Logic Overview
    170
    
    Security Ramifications
    170
    
    Connection Direction
    171
    
    Key Fields for Configuring Rules
    171
    
    Alerts
    172
    
    Figure 96 Firewall: General
    172
    
    General Firewall Policy
    172
    
    LAN to WAN Rules
    172
    
    Firewall Rules Summary
    173
    
    Table 63 Firewall: General
    173
    
    Figure 97 Firewall Rules
    174
    
    Table 64 Firewall Rules
    174
    
    Configuring Firewall Rules
    175
    
    Figure 98 Firewall: Edit Rule
    176
    
    Figure 99 Firewall: Customized Services
    178
    
    Table 66 Customized Services
    178
    
    Example Firewall Rule
    179
    
    Figure 100 Firewall: Configure Customized Services
    179
    
    Table 67 Firewall: Configure Customized Services
    179
    
    Figure 101 Firewall Example: Rules
    180
    
    Figure 102 Edit Custom Port Example
    180
    
    Figure 103 Firewall Example: Edit Rule: Destination Address
    181
    
    Figure 105 Firewall Example: Rules: Myservice
    183
    
    Table 68 Predefined Services
    183
    
    Anti-Probing
    185
    
    Figure 106 Firewall: Anti Probing
    185
    
    Dos Thresholds
    186
    
    Table 69 Firewall: Anti Probing
    186
    
    Threshold Values
    186
    
    Configuring Firewall Thresholds
    187
    
    Half-Open Sessions
    187
    
    Figure 107 Firewall: Threshold
    188
    
    Table 70 Firewall: Threshold
    188
    
    Configuring Keyword Blocking
    191
    
    Content Filtering
    191
    
    Content Filtering Overview
    191
    
    Figure 109 Content Filter: Schedule
    192
    
    Table 71 Content Filter: Keyword
    192
    
    Configuring Trusted Computers
    193
  - Table 65 Firewall: Edit Rule
    177
  - Configuring a Customized Service
    178
  - Customized Services
    178
Chapter 12 Content Filtering

191

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