802.11g HomePlug AV ADSL2+ Gateway User's Guide
Table Of Contents
- User’s Guide
- Introduction
- Introducing the P-660HWP-Dx
- Introducing the Web Configurator
- 2.1 Web Configurator Overview
- 2.2 Accessing the Web Configurator
- 2.2.1 User Access
- 2.2.2 Administrator Access
- 2.3 Resetting the P-660HWP-Dx
- 2.3.1 Using the Reset Button
- 2.4 Navigating the Web Configurator
- 2.4.1 Navigation Panel
- 2.4.2 Status Screen
- 2.4.3 Status: Any IP Table
- 2.4.4 Status: WLAN Status
- 2.4.5 Status: Bandwidth Status
- 2.4.6 Status: Powerline Statistics
- 2.4.7 Status: Packet Statistics
- 2.4.8 Changing Login Password
- Wizards
- Network
- WAN Setup
- 5.1 WAN Overview
- 5.1.1 Encapsulation
- 5.1.2 Multiplexing
- 5.1.3 Encapsulation and Multiplexing Scenarios
- 5.1.4 VPI and VCI
- 5.1.5 IP Address Assignment
- 5.1.6 Nailed-Up Connection (PPP)
- 5.1.7 NAT
- 5.2 Metric
- 5.3 Traffic Shaping
- 5.3.1 ATM Traffic Classes
- 5.4 Zero Configuration Internet Access
- 5.5 Internet Connection
- 5.5.1 Configuring Advanced Internet Connection Setup
- 5.6 Configuring More Connections
- 5.6.1 More Connections Edit
- 5.6.2 Configuring More Connections Advanced Setup
- 5.7 Traffic Redirect
- 5.8 Configuring WAN Backup
- LAN Setup
- 6.1 LAN Overview
- 6.1.1 LANs, WANs and the P-660HWP-Dx
- 6.1.2 DHCP Setup
- 6.1.3 DNS Server Address
- 6.1.4 DNS Server Address Assignment
- 6.2 LAN TCP/IP
- 6.2.1 IP Address and Subnet Mask
- 6.2.2 RIP Setup
- 6.2.3 Multicast
- 6.2.4 Any IP
- 6.3 Configuring LAN IP
- 6.3.1 Configuring Advanced LAN Setup
- 6.4 DHCP Setup
- 6.5 LAN Client List
- 6.6 LAN IP Alias
- Wireless LAN
- 7.1 Wireless Network Overview
- 7.2 Wireless Network Setup
- 7.2.1 Requirements
- 7.2.2 Setup Information
- 7.3 Wireless Security Overview
- 7.3.1 SSID
- 7.3.2 MAC Address Filter
- 7.3.3 User Authentication
- 7.3.4 Encryption
- 7.3.5 One-Touch Intelligent Security Technology (OTIST)
- 7.4 General Wireless LAN Screen
- 7.4.1 No Security
- 7.4.2 WEP Encryption
- 7.4.3 WPA-PSK/WPA2-PSK
- 7.4.4 WPA/WPA2
- 7.4.5 Wireless LAN Advanced Setup
- 7.5 OTIST
- 7.5.1 Enabling OTIST
- 7.5.2 Starting OTIST
- 7.5.3 Notes on OTIST
- 7.6 MAC Filter
- 7.7 WMM QoS
- 7.7.1 WMM QoS Example
- 7.7.2 WMM QoS Priorities
- 7.7.3 Services
- 7.8 QoS Screen
- 7.8.1 ToS (Type of Service) and WMM QoS
- 7.8.2 Application Priority Configuration
- Powerline
- Network Address Translation (NAT)
- 9.1 NAT Overview
- 9.1.1 NAT Definitions
- 9.1.2 What NAT Does
- 9.1.3 How NAT Works
- 9.1.4 NAT Application
- 9.1.5 NAT Mapping Types
- 9.2 SUA (Single User Account) Versus NAT
- 9.3 SIP ALG
- 9.4 NAT General Setup
- 9.5 Port Forwarding
- 9.5.1 Default Server IP Address
- 9.5.2 Port Forwarding: Services and Port Numbers
- 9.5.3 Configuring Servers Behind Port Forwarding (Example)
- 9.6 Configuring Port Forwarding
- 9.6.1 Port Forwarding Rule Edit
- 9.7 Address Mapping
- 9.7.1 Address Mapping Rule Edit
- WAN Setup
- Security
- Firewalls
- 10.1 Firewall Overview
- 10.2 Types of Firewalls
- 10.2.1 Packet Filtering Firewalls
- 10.2.2 Application-level Firewalls
- 10.2.3 Stateful Inspection Firewalls
- 10.3 Introduction to ZyXEL’s Firewall
- 10.3.1 Denial of Service Attacks
- 10.4 Denial of Service
- 10.4.1 Basics
- 10.4.2 Types of DoS Attacks
- 10.5 Stateful Inspection
- 10.5.1 Stateful Inspection Process
- 10.5.2 Stateful Inspection and the P-660HWP-Dx
- 10.5.3 TCP Security
- 10.5.4 UDP/ICMP Security
- 10.5.5 Upper Layer Protocols
- 10.6 Guidelines for Enhancing Security with Your Firewall
- 10.6.1 Security In General
- 10.7 Packet Filtering Vs Firewall
- 10.7.1 Packet Filtering:
- 10.7.2 Firewall
- Firewall Configuration
- 11.1 Access Methods
- 11.2 Firewall Policies Overview
- 11.3 Rule Logic Overview
- 11.3.1 Rule Checklist
- 11.3.2 Security Ramifications
- 11.3.3 Key Fields For Configuring Rules
- 11.4 Connection Direction
- 11.4.1 LAN to WAN Rules
- 11.4.2 Alerts
- 11.5 General Firewall Policy
- 11.6 Firewall Rules Summary
- 11.6.1 Configuring Firewall Rules
- 11.6.2 Customized Services
- 11.6.3 Configuring a Customized Service
- 11.7 Example Firewall Rule
- 11.8 Predefined Services
- 11.9 Anti-Probing
- 11.10 DoS Thresholds
- 11.10.1 Threshold Values
- 11.10.2 Half-Open Sessions
- 11.10.3 Configuring Firewall Thresholds
- Content Filtering
- Certificates
- 13.1 Certificates Overview
- 13.1.1 Advantages of Certificates
- 13.2 Self-signed Certificates
- 13.3 Verifying a Certificate
- 13.3.1 Checking the Fingerprint of a Certificate on Your Computer
- 13.4 Configuration Summary
- 13.5 My Certificates
- 13.6 My Certificates > Details
- 13.7 My Certificates > Create
- 13.8 My Certificates > Import
- 13.8.1 Certificate File Formats
- 13.9 Trusted CAs
- 13.10 Trusted CA Details
- 13.11 Trusted CA > Import
- 13.12 Trusted Remote Hosts
- 13.13 Trusted Remote Hosts > Import
- 13.14 Trusted Remote Host Certificate Details
- 13.15 Directory Servers
- 13.16 Directory Server Add or Edit
- Firewalls
- Advanced
- Static Route
- Bandwidth Management
- 15.1 Bandwidth Management Overview
- 15.2 Application-based Bandwidth Management
- 15.3 Subnet-based Bandwidth Management
- 15.4 Application and Subnet-based Bandwidth Management
- 15.5 Scheduler
- 15.5.1 Priority-based Scheduler
- 15.5.2 Fairness-based Scheduler
- 15.6 Maximize Bandwidth Usage
- 15.6.1 Reserving Bandwidth for Non-Bandwidth Class Traffic
- 15.6.2 Maximize Bandwidth Usage Example
- 15.6.3 Bandwidth Management Priorities
- 15.7 Over Allotment of Bandwidth
- 15.8 Configuring Summary
- 15.9 Bandwidth Management Rule Setup
- 15.10 DiffServ
- 15.10.1 DSCP and Per-Hop Behavior
- 15.10.2 Rule Configuration
- 15.11 Bandwidth Monitor
- Dynamic DNS Setup
- Remote Management Configuration
- 17.1 Remote Management Overview
- 17.1.1 Remote Management Limitations
- 17.1.2 Remote Management and NAT
- 17.1.3 System Timeout
- 17.2 WWW
- 17.3 Telnet
- 17.4 Configuring Telnet
- 17.5 Configuring FTP
- 17.6 SNMP
- 17.6.1 Supported MIBs
- 17.6.2 SNMP Traps
- 17.6.3 Configuring SNMP
- 17.7 Configuring DNS
- 17.8 Configuring ICMP
- 17.9 TR-069
- Universal Plug-and-Play (UPnP)
- 18.1 Introducing Universal Plug and Play
- 18.1.1 How do I know if I'm using UPnP?
- 18.1.2 NAT Traversal
- 18.1.3 Cautions with UPnP
- 18.2 UPnP and ZyXEL
- 18.2.1 Configuring UPnP
- 18.3 Installing UPnP in Windows Example
- 18.3.1 Installing UPnP in Windows Me
- 18.3.2 Installing UPnP in Windows XP
- 18.4 Using UPnP in Windows XP Example
- 18.4.1 Auto-discover Your UPnP-enabled Network Device
- 18.4.2 Web Configurator Easy Access
- Maintenance and Troubleshooting
- Appendices and Index
Chapter 9 Network Address Translation (NAT)
P-660HWP-Dx User’s Guide
38
The following table summarizes these types.
9.2 SUA (Single User Account) Versus NAT
SUA (Single User Account) is a ZyNOS implementation of a subset of NAT that supports two
types of mapping, Many-to-One and Server. The P-660HWP-Dx also supports Full
Feature NAT to map multiple global IP addresses to multiple private LAN IP addresses of
clients or servers using mapping types as outlined in Table 48 on page 38.
• Choose SUA Only if you have just one public WAN IP address for your P-660HWP-Dx.
• Choose Full Feature if you have multiple public WAN IP addresses for your P-660HWP-
Dx.
9.3 SIP ALG
Some applications, such as SIP, cannot operate through NAT (are NAT un-friendly) because
they embed IP addresses and port numbers in their packets’ data payload.
Some NAT routers may include a SIP Application Layer Gateway (ALG). An Application
Layer Gateway (ALG) manages a specific protocol (such as SIP, H.323 or FTP) at the
application layer.
A SIP ALG allows SIP calls to pass through NAT by examining and translating IP addresses
embedded in the data stream.
When the P-660HWP-Dx registers with the SIP register server, the SIP ALG translates the P-
660HWP-Dx’s private IP address inside the SIP data stream to a public IP address. You do not
need to use STUN or an outbound proxy if your P-660HWP-Dx is behind a SIP ALG.
Table 48 NAT Mapping Types
TYPE IP MAPPING
One-to-One ILA1ÅÆ IGA1
Many-to-One (SUA/PAT) ILA1ÅÆ IGA1
ILA2ÅÆ IGA1
…
Many-to-Many Overload ILA1ÅÆ IGA1
ILA2ÅÆ IGA2
ILA3ÅÆ IGA1
ILA4ÅÆ IGA2
…
Many-to-Many No Overload ILA1ÅÆ IGA1
ILA2ÅÆ IGA2
ILA3ÅÆ IGA3
…
Server Server 1 IPÅÆ IGA1
Server 2 IPÅÆ IGA1
Server 3 IPÅÆ IGA1