ZyXEL Communications 200 Series User Manual page 34

List of Figures
Figure 211 Multiple Servers Behind NAT Example ............................................................................... 309
Figure 212 Network > Virtual Server .................................................................................................... 310
Figure 213 Network > Virtual Server > Edit ...........................................................................................311
Figure 214 NAT 1:1 Example Network Topology .................................................................................. 313
Figure 215 Create Address Objects ..................................................................................................... 314
Figure 216 Address Objects ................................................................................................................. 314
Figure 217 NAT 1:1 Example Virtual Server ......................................................................................... 315
Figure 218 Create a Virtual Server ....................................................................................................... 315
Figure 219 NAT 1:1 Example Policy Route .......................................................................................... 316
Figure 220 Create a Policy Route ........................................................................................................ 316
Figure 221 Create a Firewall Rule ........................................................................................................ 317
Figure 222 LAN1 Computer Queries the DNS Server .......................................................................... 317
Figure 223 NAT Loopback Virtual Server ............................................................................................. 318
Figure 224 Create a Virtual Server ....................................................................................................... 318
Figure 225 Triangle Route ................................................................................................................... 319
Figure 226 NAT Loopback Policy Route ............................................................................................. 319
Figure 227 Create a Policy Route ........................................................................................................ 320
Figure 228 NAT Loopback Successful ............................................................................................... 320
Figure 229 HTTP Redirect Example ..................................................................................................... 321
Figure 230 Network > HTTP Redirect .................................................................................................. 323
Figure 231 Network > HTTP Redirect > Edit ........................................................................................ 323
Figure 232 SIP ALG Example ............................................................................................................. 325
Figure 233 H.323 ALG Example .......................................................................................................... 326
Figure 234 VoIP Calls from the WAN with Multiple Outgoing Calls ...................................................... 327
Figure 235 VoIP with Multiple WAN IP Addresses ............................................................................... 328
Figure 236 Network > ALG .................................................................................................................. 329
Figure 237 Default Firewall Action ....................................................................................................... 335
Figure 238 Blocking All LAN to WAN IRC Traffic Example .................................................................. 338
Figure 239 Limited LAN to WAN IRC Traffic Example .......................................................................... 339
Figure 240 Firewall Example: Select the Traveling Direction of Traffic ................................................ 341
Figure 241 Firewall Example: Edit a Firewall Rule 1 ............................................................................ 341
Figure 242 Firewall Example: Create an Address Object ..................................................................... 341
Figure 243 Firewall Example: Create a Service Object ........................................................................ 342
Figure 244 Firewall Example: Edit a Firewall Rule ............................................................................... 342
Figure 245 Firewall Example: MyService Example Rule in Summary .................................................. 342
Figure 246 Using Virtual Interfaces to Avoid Asymmetrical Routes ..................................................... 343
Figure 247 Firewall ............................................................................................................................... 344
Figure 248 Firewall > Edit ..................................................................................................................... 346
Figure 249 IPSec VPN Example .......................................................................................................... 351
Figure 250 VPN: IKE SA and IPSec SA .............................................................................................. 352
Figure 251 VPN > IPSec VPN > VPN Connection ............................................................................... 353
Figure 252 VPN > IPSec VPN > VPN Connection > Edit (IKE) ........................................................... 356
Figure 253 VPN > IPSec VPN > VPN Connection > Manual Key > Edit .............................................. 361
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ZyWALL USG 100/200 Series User's Guide