ZyXEL Communications ZYWALL 1050 - V2.00 EDITION 1 User Manual page 17

16.2 Virtual Server Example .................................................................................................... 252
16.3 Virtual Server Screens ..................................................................................................... 252
16.4 Virtual Server Summary Screen ...................................................................................... 252
16.4.1 Virtual Server Add/Edit .......................................................................................... 254
Chapter 17
HTTP Redirect ...................................................................................................................... 257
17.1 HTTP Redirect Overview ................................................................................................. 257
17.1.1 Web Proxy Server .................................................................................................. 257
17.2 HTTP Redirect, Firewall and Policy Route ...................................................................... 257
17.3 Configuring HTTP Redirect ............................................................................................. 258
17.4 HTTP Redirect Edit ......................................................................................................... 259
Chapter 18
ALG ........................................................................................................................................ 261
18.1 ALG Introduction .............................................................................................................. 261
18.1.1 Application Layer Gateway (ALG) and NAT ........................................................... 261
18.1.2 ALG and Trunks ..................................................................................................... 261
18.1.3 FTP ........................................................................................................................ 262
18.1.4 H.323 ...................................................................................................................... 262
18.1.5 RTP ........................................................................................................................ 262
18.1.6 SIP ......................................................................................................................... 263
18.2 Peer-to-Peer Calls and the ZyWALL ............................................................................... 264
18.2.1 VoIP Calls from the WAN with Multiple Outgoing Calls .......................................... 264
18.2.2 VoIP with Multiple WAN IP Addresses ................................................................... 264
18.3 ALG Screen ..................................................................................................................... 265
18.4 WAN to LAN SIP Peer-to-peer Calls Example ................................................................ 267
Part III: Firewall and VPN..................................................................... 271
Chapter 19
Firewall................................................................................................................................. 273
19.1 Firewall Overview ............................................................................................................ 273
19.2 Firewall Rules .................................................................................................................. 274
19.2.1 Rule Directions ....................................................................................................... 274
19.2.2 Firewall and VPN Traffic ......................................................................................... 276
19.3 Firewall Rule Example Applications ................................................................................ 276
19.4 Alerts ............................................................................................................................... 278
19.5 Asymmetrical Routes ....................................................................................................... 278
19.5.1 Virtual Interfaces and Asymmetrical Routes .......................................................... 279
19.6 Configuring the Firewall ................................................................................................... 279
ZyWALL 1050 User's Guide
Table of Contents
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