ZyXEL Communications ZyWall 10 User Manual page 19

ZyWALL 10~100 Series Internet Security Gateway
Figure 9-1 How NAT Works .......................................................................................................................... 9-3
Figure 9-2 NAT Application With IP Alias .................................................................................................... 9-4
Figure 9-3 Multiple Servers Behind NAT Example ....................................................................................... 9-8
Figure 9-4 SUA/NAT Setup ........................................................................................................................... 9-9
Figure 9-5 Address Mapping.........................................................................................................................9-11
Figure 9-6Address Mapping Edit................................................................................................................. 9-12
Figure 9-7 Trigger Port ................................................................................................................................ 9-15
Figure 10-1 Example of Static Routing Topology........................................................................................ 10-1
Figure 10-2 Edit IP Static Route .................................................................................................................. 10-2
Figure 11-1 ZyWALL Firewall Application..................................................................................................11-3
Figure 11-2 Three-Way Handshake...............................................................................................................11-5
Figure 11-3 SYN Flood.................................................................................................................................11-5
Figure 11-4 Smurf Attack..............................................................................................................................11-6
Figure 11-5 Stateful Inspection .....................................................................................................................11-8
Figure 12-1 LAN to WAN Traffic................................................................................................................ 12-4
Figure 12-2 WAN to LAN Traffic................................................................................................................ 12-5
Figure 12-3 Enabling the Firewall (ZyWALL 100)...................................................................................... 12-6
Figure 12-4 Creating/Editing A Firewall Rule (ZyWALL100) .................................................................... 12-9
Figure 12-5 Adding/Editing Source and Destination Addresses .................................................................12-11
Figure 12-6 Creating/Editing A Custom Port............................................................................................. 12-12
Figure 12-7 Firewall IP Config Screen ...................................................................................................... 12-13
Figure 12-8 Firewall Rule Edit IP Example ............................................................................................... 12-14
Figure 12-9 Edit Custom Port Example ..................................................................................................... 12-14
Figure 12-10 MyService Rule Configuration (ZyWALL100).................................................................... 12-15
Figure 12-11 My Service Example Rule Summary (ZyWALL100) .......................................................... 12-16
Figure 12-12 Attack Alert .......................................................................................................................... 12-22
Figure 13-1Content Filter: Categories.......................................................................................................... 13-2
Figure 13-2 Content Filter: Free .................................................................................................................. 13-6
Figure 13-3 Content Filter: iCard................................................................................................................. 13-7
Figure 13-4 Content Filter: List Update....................................................................................................... 13-8
Figure 13-5 Content Filter: Exempt Zone .................................................................................................. 13-10
Figure 13-6 Content Filter: Customize....................................................................................................... 13-12
Figure 13-7 Content Filter: Keyword Blocking ......................................................................................... 13-14
Figure 14-1 Encryption and Decryption....................................................................................................... 14-2
Figure 14-2 VPN Application ...................................................................................................................... 14-3
Figure 14-3 IPSec Architecture.................................................................................................................... 14-4
Figure 14-4 Transport and Tunnel Mode IPSec Encapsulation.................................................................... 14-5
Figure 15-1 IPSec Summary Fields ............................................................................................................. 15-3
Figure 15-2 Summary .................................................................................................................................. 15-4
Figure 15-3 NAT Router Between IPSec Routers........................................................................................ 15-6
Figure 15-4 VPN IKE ................................................................................................................................ 15-10
List of Figures xix