ZyXEL Communications ZYWALL10 Chapter 16 Creating Custom Rules

ZyWALL 10 Internet Security Gateway

14.1	SMT Menus...............................................................................................................................		14-1
14.1.1		View Firewall Log ............................................................................................................	14-2
14.1.2		Attack Types .....................................................................................................................	14-2
14.2	The Big Picture - Filtering, Firewall and NAT .........................................................................		14-5
14.3	Packet Filtering Vs Firewall......................................................................................................		14-6
14.3.1		Packet Filtering: ................................................................................................................	14-6
14.3.2		Firewall .............................................................................................................................	14-7
Chapter 15 Introducing the ZyWALL Web Configurator..................................................................			15-1
15.1	Web Configurator Login and Welcome Screens.......................................................................		15-1
15.2	Enabling the Firewall ................................................................................................................		15-3
15.3	E-mail........................................................................................................................................		15-3
15.3.1		What are Alerts?................................................................................................................	15-3
15.3.2		What are Logs? .................................................................................................................	15-4
15.3.3		SMTP Error Messages ......................................................................................................	15-6
15.3.4		Example E-mail Log .........................................................................................................	15-6
15.4	Attack Alert...............................................................................................................................		15-7
15.4.1		Threshold Values: .............................................................................................................	15-7
15.4.2		Half-Open Sessions...........................................................................................................	15-8
Chapter 16 Creating Custom Rules ......................................................................................................			16-1
16.1	Rules Overview.........................................................................................................................		16-1
16.2	Rule Logic Overview ................................................................................................................		16-1
16.2.1		Rule Checklist ...................................................................................................................	16-1
16.2.2		Security Ramifications ......................................................................................................	16-2
16.2.3 Key Fields For Configuring Rules ....................................................................................			16-2
16.3	Connection Direction ................................................................................................................		16-3
16.3.1 LAN to WAN Rules..........................................................................................................			16-3
16.3.2 WAN to LAN Rules..........................................................................................................			16-3
16.4	Rule Summary...........................................................................................................................		16-4
16.5	Predefined Services...................................................................................................................		16-7
16.5.1		Creating/Editing Firewall Rules......................................................................................	16-10
16.5.2 Source and Destination Addresses ..................................................................................			16-12
16.6	Timeout ...................................................................................................................................		16-14
16.6.1 Factors Influencing Choices for Timeout Values............................................................			16-14
Chapter 17 Custom Ports.......................................................................................................................			17-1

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