User's Manual

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Table Of Contents

Dynamic DNS Setup
- 13.1 Overview
  - 13.1.1 What You Can Do in the DDNS Screen
  - 13.1.2 What You Need To Know About DDNS
- 13.2 The Dynamic DNS Screen
Filters
- 14.1 Overview
  - 14.1.1 What You Can Do in the Filter Screens
  - 14.1.2 What You Need to Know About Filtering
- 14.2 The IP/MAC Filter Screen
- 14.3 IPv6/MAC Filter
Firewall
- 15.1 Overview
  - 15.1.1 What You Can Do in the Firewall Screens
  - 15.1.2 What You Need to Know About Firewall
- 15.2 The Firewall General Screen
- 15.3 The Default Action Screen
- 15.4 The Rules Screen
- 15.5 The DoS Screen
  - 15.5.1 The DoS Advanced Screen
  - 15.5.2 Configuring Firewall Thresholds
- 15.6 Firewall Technical Reference
Parental Control
- 16.1 Overview
- 16.2 The Parental Control Screen
  - 16.2.1 Add/Edit Parental Control Rule
Certificate
- 17.1 Overview
  - 17.1.1 What You Can Do in this Chapter
- 17.2 What You Need to Know
- 17.3 Local Certificates
- 17.4 The Trusted CA Screen
- 17.5 Trusted CA Import
- 17.6 View Certificate
Logs
- 18.1 Overview
  - 18.1.1 What You Can Do in this Chapter
  - 18.1.2 What You Need To Know
- 18.2 The System Log Screen
Traffic Status
- 19.1 Overview
  - 19.1.1 What You Can Do in this Chapter
- 19.2 The WAN Status Screen
- 19.3 The LAN Status Screen
- 19.4 The NAT Screen
User Account
- 20.1 Overview
- 20.2 The User Account Screen
TR-069 Client
- 21.1 Overview
- 21.2 The TR-069 Client Screen
System Settings
- 22.1 Overview
  - 22.1.1 What You Can Do in the System Settings Screens
- 22.2 The System Screen
- 22.3 The Time Screen
Firmware Upgrade
- 23.1 Overview
- 23.2 The Firmware Screen
Backup/Restore
- 24.1 Overview
- 24.2 The Backup/Restore Screen
- 24.3 The Reboot Screen
Remote Management
- 25.1 Overview
  - 25.1.1 What You Can Do in the Remote Management Screens
  - 25.1.2 What You Need to Know About Remote Management
- 25.2 The WWW Screen
  - 25.2.1 Configuring the WWW Screen
- 25.3 The Telnet Screen
- 25.4 The FTP Screen
- 25.5 The SNMP Screen
  - 25.5.1 Configuring SNMP
- 25.6 The DNS Screen
- 25.7 The ICMP Screen
- 25.8 The SSH Screen
  - 25.8.1 SSH Example
Diagnostic
- 26.1 Overview
  - 26.1.1 What You Can Do in the Diagnostic Screens
- 26.2 The General Screen
- 26.3 The DSL Line Screen
Troubleshooting
- 27.1 Power, Hardware Connections, and LEDs
- 27.2 AMG1302/AMG1202-TSeries Access and Login
- 27.3 Internet Access
Setting up Your Computer’s IP Address
IP Addresses and Subnetting
Pop-up Windows, JavaScripts and Java Permissions
Wireless LANs
IPv6
Services
Legal Information
Index

Chapter 15 Firewall

AMG1302/AMG1202-TSeries User’s Guide

186

The following table describes the labels in this screen.

15.6 Firewall Technical Reference

This section provides some technical background information about the topics covered in this

chapter.

15.6.1 Firewall Rules Overview

Your customized rules take precedence and override the AMG1302/AMG1202-TSeries’s default

settings. The AMG1302/AMG1202-TSeries checks the source IP address, destination IP address and

IP protocol type of network traffic against the firewall rules (in the order you list them). When the

traffic matches a rule, the AMG1302/AMG1202-TSeries takes the action specified in the rule.

Firewall rules are grouped based on the direction of travel of packets to which they apply:

Note: The LAN includes both the LAN port and the WLAN.

By default, the AMG1302/AMG1202-TSeries’s stateful packet inspection allows packets traveling in

the following directions:

•LAN to Router

These rules specify which computers on the LAN can manage the AMG1302/AMG1202-TSeries

(remote management).

Note: You can also configure the remote management settings to allow only a specific

computer to manage the AMG1302/AMG1202-TSeries.

Table 67 Security > Firewall > DoS > Advanced

LABEL DESCRIPTION

TCP SYN-Request

Count

This is the rate of new TCP half-open sessions per second that causes the firewall to

start deleting half-open sessions. When the rate of new connection attempts rises

above this number, the AMG1302/AMG1202-TSeries deletes half-open sessions as

required to accommodate new connection attempts.

UDP Packet Count This is the rate of new UDP half-open sessions per second that causes the firewall to

start deleting half-open sessions. When the rate of new connection attempts rises

above this number, the AMG1302/AMG1202-TSeries deletes half-open sessions as

required to accommodate new connection attempts.

ICMP Echo-Request

Count

This is the rate of new ICMP Echo-Request half-open sessions per second that causes

the firewall to start deleting half-open sessions. When the rate of new connection

attempts rises above this number, the AMG1302/AMG1202-TSeries deletes half-open

sessions as required to accommodate new connection attempts.

Back Click this button to return to the previous screen.

Apply Click this to save your changes.

Cancel Click this to restore your previously saved settings.

•LAN to Router •WAN to LAN

• LAN to WAN • WAN to Router