Chapter 9 Network Address Translation (NAT)
AMG1202-T10A User’s Guide
135
9.5 The ALG Screen
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 if your ZyXEL Device is behind a SIP ALG.
Use this screen to enable and disable the SIP (VoIP) ALG in the ZyXEL Device. To access this
screen, click
Network > NAT > ALG
.
Figure 70
Network > NAT > ALG
The following table describes the fields in this screen.
9.6 NAT Technical Reference
This chapter contains more information regarding NAT.
9.6.1 NAT Definitions
Inside/outside denotes where a host is located relative to the ZyXEL Device, for example, the
computers of your subscribers are the inside hosts, while the web servers on the Internet are the
outside hosts.
Back
Click this to return to the previous screen without saving.
Apply
Click this to save your changes.
Cancel
Click this to restore your previously saved settings.
Table 45
Network > NAT > Address Mapping: Edit (continued)
LABEL
DESCRIPTION
Table 46
Network > NAT > ALG
LABEL
DESCRIPTION
Enable SIP ALG
Select this to make sure SIP (VoIP) works correctly with port-forwarding and
address-mapping rules.
Apply
Click this to save your changes.
Reset
Click this to restore your previously saved settings.
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Страница 26: ...Chapter 1 Introduction AMG1202 T10A User s Guide 26 ...
Страница 32: ...Chapter 2 The Web Configurator AMG1202 T10A User s Guide 32 ...
Страница 36: ...Chapter 3 Status Screens AMG1202 T10A User s Guide 36 ...
Страница 53: ...53 PART II Technical Reference ...
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Страница 84: ...Chapter 6 WAN Setup AMG1202 T10A User s Guide 84 ...
Страница 96: ...Chapter 7 LAN Setup AMG1202 T10A User s Guide 96 ...
Страница 126: ...Chapter 8 Wireless LAN AMG1202 T10A User s Guide 126 ...
Страница 142: ...Chapter 10 Firewall AMG1202 T10A User s Guide 142 ...
Страница 148: ...Chapter 11 Filters AMG1202 T10A User s Guide 148 ...
Страница 152: ...Chapter 12 Static Route AMG1202 T10A User s Guide 152 ...
Страница 158: ...Chapter 13 802 1Q 1P AMG1202 T10A User s Guide 158 ...
Страница 166: ...Chapter 14 Quality of Service QoS AMG1202 T10A User s Guide 166 ...
Страница 202: ...Chapter 19 Logs AMG1202 T10A User s Guide 202 ...
Страница 223: ...Chapter 23 Product Specifications AMG1202 T10A User s Guide 223 ...
Страница 224: ...Chapter 23 Product Specifications AMG1202 T10A User s Guide 224 ...
Страница 264: ...Appendix C Pop up Windows JavaScripts and Java Permissions AMG1202 T10A User s Guide 264 ...
Страница 278: ...Appendix D Wireless LANs AMG1202 T10A User s Guide 278 ...
Страница 286: ...Appendix F Legal Information AMG1202 T10A User s Guide 286 ...
Страница 294: ...Index AMG1202 T10A User s Guide 294 ...
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