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ZyXEL Communications 794M 6.4 Packet Filter, Packet Filter, Configuration, General Settings, General Settings, Firewall and Packet Filters

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Prestige 794M User’s Guide

The following table lists inbound (Internet to LAN) and outbound (LAN to Internet) traffic that is allowed or not allowed for the pre-defined port filters. The Prestige uses the pre-defined port filters when you select a security level in the General Settings screen.

Table 30 Pre-defined Port Filter

		PORT		FIREWALL
		PORT
APPLICATION	PROTOCOL	NUMBER		HIGH			MEDIUM		LOW

		START	END	INBOUND	OUTBOUND		INBOUND	OUTBOUND	INBOUND	OUTBOUND

HTTP(80)	TCP(6)	80	80	NO		YES	NO	YES	NO	YES

DNS (53)	UDP(17)	53	53	NO		YES	NO	YES	YES	YES

DNS (53)	TCP(6)	53	53	NO		YES	NO	YES	YES	YES

FTP(21)	TCP(6)	21	21	NO		NO	NO	YES	NO	YES

Telnet(23)	TCP(6)	23	23	NO		NO	NO	YES	NO	YES

SMTP(25)	TCP(6)	25	25	NO		YES	NO	YES	NO	YES

POP3(110)	TCP(6)	110	110	NO		YES	NO	YES	NO	YES

NEWS(119)	TCP(6)	119	119	NO		NO	NO	YES	NO	YES

RealAudio	UDP(17)	7070	7070	NO		NO	YES	YES	YES	YES
(7070)

PING	ICMP(1)	N/A	N/A	NO		YES	NO	YES	NO	YES

H.323(1720)	TCP(6)	1720	1720	NO		NO	NO	YES	YES	YES

T.120(1503)	TCP(6)	1503	1503	NO		NO	NO	YES	YES	YES

SSH(22)	TCP(6)	22	22	NO		NO	NO	YES	YES	YES

NTP(123)	UDP(17)	123	123	NO		YES	NO	YES	NO	YES

HTTPS(443)	TCP(6)	443	443	NO		NO	NO	YES	NO	YES

ICQ (5190)	TCP(6)	5190	5190	NO		NO	NO	NO	YES	YES

6.4 Packet Filter

The packet filters are applicable when the firewall is enabled in the General Settings screen.

Use the Packet Filter screen to configure port and address filters. Click Configuration,

Firewall and Packet Filters.

67	Chapter 6 Firewall

Contents

User’s Guide Copyright Disclaimer Trademarks Federal Communications Commission (FCC) Interference Statement Notice Certifications Safety Warnings ZyXEL Limited Warranty Note Safety Warnings Customer Support Page Table of Contents Page Page QoS (Quality of Service) Static Route Page Page List of Figures Page List of Tables Page Preface About This User's Guide Related Documentation User Guide Feedback Syntax Conventions Graphics Icons Key Introduction 1.1 About Your Prestige 1.2 Features Multi-ModeStandard 10/100M Auto-negotiatingEthernet/Fast Ethernet Interface(s) Multiplexing Full Network Management Universal Plug and Play (UPnP) Network Address Translation (NAT) Firewall 1.3 Applications 1.3.1 Internet Access 1.3.2 Firewall for Secure Broadband Internet Access 1.3.3 VPN Application 1.3.4 LAN-to-LANApplication 1.4 Hardware Connection 1.4.1 Front Panel 1.5 Rear Panel The Web Configurator 2.1 Overview 2.2Accessing the Web Configurator 2.3 Resetting the Prestige 2.3.1 Procedure To Use The Reset Button 2.4Navigating the Web Configurator 2.4.1 The Status Screen 2.5System Status 2.6 ARP Table 2.6.1 How ARP Works 2.7 Routing Table 2.7.1 PPTP Status 2.7.2 IPSec Status 2.7.3 L2TP Status 2.7.4 Email Status 2.7.5 Event Log 2.7.6 Error Log 2.7.7 NAT Sessions 2.8 Internet Access Quick Start Setup Page 2.8.1 Auto Scan LAN 3.1 Overview 3.2 LAN TCP/IP 3.2.1 Factory LAN Defaults 3.2.2 IP Address and Subnet Mask 3.3The Ethernet Screen 3.4 Ethernet Client Filter 3.4.1 Ethernet Client Filter Candidates 3.5 Port Setting 3.6 DHCP 3.6.1 IP Pool Setup 3.6.2 DNS Servers 3.6.3DHCP Setup 3.6.3.1 Disable DHCP 3.6.3.2 DHCP Server Setup Page 3.6.4 DHCP Relay Agent DHCP Relay WAN 4.1 Overview 4.1.1 Encapsulation Types 4.1.1.1 RFC 4.1.1.2 PPPoE 4.2 ISP 4.2.1 Edit Settings 4.2.1.1 Advanced PPP Options Page 4.2.2 Change Connection Type 4.3DNS 4.4 SHDSL Parameters Table 25 SHDSL Page System 5.1 Overview 5.2 Time Zone 5.3 Remote Access 5.4 Firmware Upgrade 5.5Backup/Restore 5.6 Restart Router 5.7 User Management 5.7.1 Create a New User Account Page Firewall 6.1 Overview 6.2 Types of Firewalls 6.2.1Packet Filtering Firewalls 6.2.2 Application-levelFirewalls 6.2.3Stateful Inspection Firewalls 6.3 General Settings 6.4 Packet Filter Policy Firewall: General Settings 6.4.1 Add a New TCP/UDP Packet Filter 6.4.2 Add a New Raw Packet Filter 6.5 Intrusion Detection Intrusion Detection 6.6 URL Filter 6.6.1 Keywords Filtering 6.6.2 Domain Filtering 6.7 Firewall Log Page VPN 7.1 Overview 7.2 PPTP 7.2.1 PPTP Summary 7.2.2 Creating a PPTP VPN Rule 7.2.2.1 Remote Access Connection Page 7.2.2.2 LAN to LAN Connection Page 7.3 IPSec 7.3.1 AH (Authentication Header) 7.3.2 ESP (Encapsulating Security Payload) 7.3.3 Perfect Forward Secrecy (PFS) 7.3.4 Pre-SharedKey 7.3.5 IPSec VPN Summary 7.3.6 IPSec VPN Configuration Page 7.4 L2TP 7.4.1 Creating a New L2TP Rule 7.4.1.1 Remote Access L2TP Connection Page 7.4.1.2 LAN to LAN L2TP Connection Page Page 7.5 VPN Example 7.5.1 Example: Remote PPTP VPN Dial-inConnection 7.5.2 Example: Remote PPTP VPN Dial-outConnection MUST QoS (Quality of Service) 8.1 Overview 8.1.1 Prioritization Page 8.2 IP Throttling Page 8.3 QoS Example 8.3.1 Example Prioritization with QoS 8.3.2 Rate Limiting with IP Throttling Example 8.4 Time Schedule 8.4.1 Configuring a Time Schedule Page Static Route 9.1 Overview 9.2 Configuration Page Dynamic DNS 10.1 Overview 10.1.1 Configuration Page Check Emails 11.1 Overview 11.2 Configuring Page Device Management 12.1 Overview 12.1.1 Universal Plug and Play (UPnP) 12.1.1.1 How do I know if I'm using UPnP 12.1.1.2 Cautions with UPnP 12.1.2.1SNMPv3 12.1.2.2 SNMP Traps and MIBs 12.2 The Device Management Screen WAN Page 12.3 IGMP Numerics Index