ZyXEL Communications ZyWALL 2 Series manual VPN/IPSec

		ZyWALL 2 Series User’s Guide
10.3	Introduction to ZyXEL’s Firewall........................................................................................	10-2
10.4	Denial of Service..................................................................................................................	10-3
10.5	Stateful Inspection................................................................................................................	10-7
10.6	Guidelines For Enhancing Security With Your Firewall ...................................................	10-11
10.7	Packet Filtering Vs Firewall...............................................................................................	10-11
Chapter 11 Firewall Screens ..................................................................................................................		11-1
11.1	Access Methods ...................................................................................................................	11-1
11.2	Firewall Policies Overview ..................................................................................................	11-1
11.3	Rule Logic Overview ...........................................................................................................	11-2
11.4	Connection Direction Examples...........................................................................................	11-3
11.5	Alerts....................................................................................................................................	11-5
11.6	Configuring Firewall............................................................................................................	11-5
11.7	Example Firewall Rule.......................................................................................................	11-13
11.8	Predefined Services............................................................................................................	11-18
11.9	Configuring Attack Alert ...................................................................................................	11-20
Chapter 12 Content Filtering Screens..................................................................................................		12-1
12.1	Introduction to Content Filtering..........................................................................................	12-1
12.2	General Content Filter Configuration...................................................................................	12-1
12.3	Content Filtering with an External Server............................................................................	12-4
12.4	Checking Content Filtering Activation ................................................................................	12-5
12.5	Configuring for Registering and Categories.........................................................................	12-5
12.6	Configuring Customization ................................................................................................	12-14
VPN/IPSec	.....................................................................................................................................................	VI
Chapter 13 Introduction to IPSec.........................................................................................................		13-1
13.1	VPN Overview .....................................................................................................................	13-1
13.2	IPSec Architecture ...............................................................................................................	13-3
13.3	Encapsulation .......................................................................................................................	13-4
13.4	IPSec and NAT ....................................................................................................................	13-5
Chapter 14 VPN Screens.......................................................................................................................		14-1
14.1	VPN/IPSec Overview...........................................................................................................	14-1
14.2	IPSec Algorithms .................................................................................................................	14-1
14.3	My IP Address......................................................................................................................	14-2
14.4	Secure Gateway Address......................................................................................................	14-2
14.5	Summary Screen ..................................................................................................................	14-3
14.6	Keep Alive ...........................................................................................................................	14-5
14.7	NAT Traversal .....................................................................................................................	14-6
14.8	ID Type and Content............................................................................................................	14-8
14.9	Pre-Shared Key ..................................................................................................................	14-10
14.10	VPN Implementation..........................................................................................................	14-10
14.11	Configuring Basic IKE VPN Rule Setup ...........................................................................	14-11
14.12	IKE Phases .........................................................................................................................	14-21

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