ZyXEL Communications 10 User Manual page 19

ZyWALL 10~100 Series Internet Security Gateway
Figure 12-11 Multiple Servers Behind NAT Example ............................................................................... 12-16
Figure 12-12 NAT Example 1 .................................................................................................................... 12-17
Figure 12-13 Menu 4: Internet Access & NAT Example ........................................................................... 12-17
Figure 12-14 NAT Example 2 .................................................................................................................... 12-18
Figure 12-15 Menu 15.2: Specifying an Inside Server............................................................................... 12-19
Figure 12-16 NAT Example 3 .................................................................................................................... 12-20
Figure 12-17 Example 3: Menu 11.3.......................................................................................................... 12-21
Figure 12-18 Example 3: Menu 15.1.1.1 ................................................................................................... 12-21
Figure 12-19 Example 3: Final Menu 15.1.1 ............................................................................................. 12-22
Figure 12-20 Example 3: Menu 15.2 ......................................................................................................... 12-22
Figure 12-21 NAT Example 4 .................................................................................................................... 12-23
Figure 12-22 Example 4: Menu 15.1.1.1: Address Mapping Rule............................................................. 12-24
Figure 12-23 Example 4: Menu 15.1.1: Address Mapping Rules .............................................................. 12-24
Figure 12-24 Trigger Port Forwarding Process: Example.......................................................................... 12-25
Figure 12-25 Menu 15.3-Trigger Port Setup ........................................................................................... 12-26
Figure 13-1 ZyWALL Firewall Application................................................................................................. 13-3
Figure 13-2 Three-Way Handshake ............................................................................................................. 13-5
Figure 13-3 SYN Flood................................................................................................................................ 13-5
Figure 13-4 Smurf Attack ............................................................................................................................ 13-6
Figure 13-5 Stateful Inspection .................................................................................................................... 13-8
Figure 14-1 Menu 21: Filter and Firewall Setup.......................................................................................... 14-1
Figure 14-2 Menu 21.2: Firewall Setup ....................................................................................................... 14-2
Figure 15-1 Enabling the Firewall (ZyWALL 100)...................................................................................... 15-2
Figure 15-2 Attack Alert .............................................................................................................................. 15-5
Figure 16-1 LAN to WAN Traffic................................................................................................................ 16-4
Figure 16-2 WAN to LAN Traffic................................................................................................................ 16-5
Figure 16-3 Firewall Rules Summary: First Screen (ZyWALL100)............................................................ 16-6
List of Figures xix