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ZyWALL 5/35/70 Series User’s Guide
17 Table of Contents
Chapter 16
Content Filtering Screens ................................................................................... 278
16.1 Content Filtering Overview .............................................................................278
16.1.1 Restrict Web Features ..........................................................................278
16.1.2 Create a Filter List ................................................................................278
16.1.3 Customize Web Site Access ................................................................278
16.2 Content Filter General .................................................................................278
16.3 Content Filtering with an External Database ..................................................280
16.4 Content Filter Categories ............................................................................281
16.5 Content Filter Customization .......................................................................288
16.6 Customizing Keyword Blocking URL Checking ..............................................290
16.6.1 Domain Name or IP Address URL Checking ........................................290
16.6.2 Full Path URL Checking .......................................................................290
16.6.3 File Name URL Checking .....................................................................290
16.7 Content Filtering Cache .................................................................................291
Chapter 17
Content Filtering Reports .................................................................................... 294
17.1 Checking Content Filtering Activation ............................................................294
17.2 Viewing Content Filtering Reports ..................................................................294
17.3 Web Site Submission .....................................................................................299
Chapter 18
Introduction to IPSec ........................................................................................... 302
18.1 VPN Overview ................................................................................................302
18.1.1 IPSec ....................................................................................................302
18.1.2 Security Association .............................................................................302
18.1.3 Other Terminology ................................................................................302
18.1.3.1 Encryption ...................................................................................302
18.1.3.2 Data Confidentiality .....................................................................303
18.1.3.3 Data Integrity ...............................................................................303
18.1.3.4 Data Origin Authentication ..........................................................303
18.1.4 VPN Applications ..................................................................................303
18.1.4.1 Linking Two or More Private Networks Together .........................303
18.1.4.2 Accessing Network Resources When NAT Is Enabled ...............303
18.1.4.3 Unsupported IP Applications .......................................................303
18.2 IPSec Architecture .........................................................................................304
18.2.1 IPSec Algorithms ..................................................................................304
18.2.2 Key Management ..................................................................................304
18.3 Encapsulation .................................................................................................304
18.3.1 Transport Mode ....................................................................................305
18.3.2 Tunnel Mode .........................................................................................305
18.4 IPSec and NAT ...............................................................................................305