Chapter 8 NAT
P-2302HWUDL-P1 Series User’s Guide
119
2
Port 7070 is a “trigger” port and causes the ZyXEL Device to record Jane’s computer IP
address. The ZyXEL Device associates Jane's computer IP address with the "incoming"
port range of 6970-7170.
3
The Real Audio server responds using a port number ranging between 6970-7170.
4
The ZyXEL Device forwards the traffic to Jane’s computer IP address.
5
Only Jane can connect to the Real Audio server until the connection is closed or times
out. The ZyXEL Device times out in three minutes with UDP (User Datagram Protocol),
or two hours with TCP/IP (Transfer Control Protocol/Internet Protocol).
8.1.2.2 Two Points To Remember About Trigger Ports
1
Trigger events only happen on data that is going coming from inside the ZyXEL Device
and going to the outside.
2
If an application needs a continuous data stream, that port (range) will be tied up so that
another computer on the LAN can’t trigger it.
8.1.3 SIP ALG
Some NAT routers may include a SIP Application Layer Gateway (ALG). A SIP ALG allows
SIP calls to pass through NAT by examining and translating IP addresses embedded in the
data stream. When the ZyXEL Device registers with the SIP register server, the SIP ALG
translates the ZyXEL Device’s private IP address inside the SIP data stream to a public IP
address. You do not need to use STUN or an outbound proxy (see
) if
your ZyXEL Device is behind a SIP ALG.
8.2 NAT Screens
8.2.1 NAT General Screen
Use this screen to enable and disable NAT and to allocate memory for NAT and firewall rules.
To access this screen, click
Network > NAT > General
.
Figure 63
Network > NAT > General
Summary of Contents for Network Device P-2302
Page 2: ......
Page 8: ...Safety Warnings P 2302HWUDL P1 Series User s Guide 8 ...
Page 10: ...Contents Overview P 2302HWUDL P1 Series User s Guide 10 Appendices and Index 285 ...
Page 32: ...32 ...
Page 46: ...Chapter 2 Introducing the Web Configurator P 2302HWUDL P1 Series User s Guide 46 ...
Page 66: ...Chapter 3 Wizard Setup P 2302HWUDL P1 Series User s Guide 66 ...
Page 77: ...77 PART II Network Wireless LAN 79 WAN 95 LAN 105 NAT 117 ...
Page 78: ...78 ...
Page 94: ...Chapter 5 Wireless LAN P 2302HWUDL P1 Series User s Guide 94 ...
Page 116: ...Chapter 7 LAN P 2302HWUDL P1 Series User s Guide 116 ...
Page 125: ...125 PART III VoIP SIP 127 Phone 141 Phone Book 155 PSTN Line 159 VoIP Trunking 161 ...
Page 126: ...126 ...
Page 136: ...Chapter 9 SIP P 2302HWUDL P1 Series User s Guide 136 Figure 74 VoIP SIP SIP Settings Advanced ...
Page 154: ...Chapter 10 Phone P 2302HWUDL P1 Series User s Guide 154 ...
Page 176: ...Chapter 13 VoIP Trunking P 2302HWUDL P1 Series User s Guide 176 ...
Page 177: ...177 PART IV Security Firewall 179 Content Filter 187 ...
Page 178: ...178 ...
Page 186: ...Chapter 14 Firewall P 2302HWUDL P1 Series User s Guide 186 ...
Page 190: ...Chapter 15 Content Filter P 2302HWUDL P1 Series User s Guide 190 ...
Page 192: ...192 ...
Page 196: ...Chapter 16 Static Route P 2302HWUDL P1 Series User s Guide 196 ...
Page 228: ...Chapter 19 UPnP P 2302HWUDL P1 Series User s Guide 228 ...
Page 250: ...Chapter 21 File Sharing P 2302HWUDL P1 Series User s Guide 250 ...
Page 251: ...251 PART VI Maintanence and Troubleshooting System 253 Logs 261 Tools 273 Troubleshooting 279 ...
Page 252: ...252 ...
Page 260: ...Chapter 22 System P 2302HWUDL P1 Series User s Guide 260 ...
Page 272: ...Chapter 23 Logs P 2302HWUDL P1 Series User s Guide 272 ...
Page 278: ...Chapter 24 Tools P 2302HWUDL P1 Series User s Guide 278 ...
Page 286: ...286 ...
Page 292: ...Appendix A Product Specifications P 2302HWUDL P1 Series User s Guide 292 ...
Page 322: ...Appendix E SIP Passthrough P 2302HWUDL P1 Series User s Guide 322 ...
Page 346: ...Appendix H Legal Information P 2302HWUDL P1 Series User s Guide 346 ...