Chapter 11 Network Address Translation (NAT)
VMG1312-B Series User’s Guide
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11.6 The ALG Screen
Som e NAT rout ers m ay include a SI P Applicat ion Layer Gat eway ( ALG) . A SI P ALG allows SI P calls
t o pass t hrough NAT by exam ining and t ranslat ing I P addresses em bedded in t he dat a st ream .
When t he Device regist ers wit h t he SI P regist er server, t he SI P ALG t ranslat es t he Device’s privat e
I P address inside t he SI P dat a st ream t o a public I P address. You do not need t o use STUN or an
out bound proxy if your Device is behind a SI P ALG.
Use t his screen t o enable and disable t he NAT and SI P ( VoI P) ALG in t he Device. To access t his
screen, click
N e t w or k Se t t in g > N AT > ALG
.
Figure 81
Net work Set t ing > NAT > ALG
The following t able describes t he fields in t his screen.
11.7 The Address Mapping Screen
Ordering your rules is im port ant because t he Device applies t he rules in t he order t hat you specify.
When a rule m at ches t he current packet , t he Device t akes t he corresponding act ion and t he
rem aining rules are ignored.
Click
N e t w or k Se t t in g > N AT > Addr e ss M a ppin g
t o display t he following screen.
Figure 82
Net work Set t ing > NAT > Address Mapping
Table 58
Net work Set t ing > NAT > ALG
LABEL
DESCRIPTION
NAT ALG
Enable t his t o m ake sure applicat ions such as FTP and file t ransfer in I M applicat ions w ork
correct ly w it h port- forwarding and address- m apping rules.
SI P ALG
Enable t his t o m ake sure SI P ( VoI P) w orks correct ly w it h port - forwarding and address-
m apping rules.
Apply
Click
Apply
t o save your changes.
Cancel
Click
Ca n ce l
t o rest ore your previously saved set t ings.
Summary of Contents for VMG1312-B Series
Page 4: ...Contents Overview VMG1312 B Series User s Guide 4 Troubleshooting 289 ...
Page 14: ...Table of Contents VMG1312 B Series User s Guide 14 ...
Page 15: ...15 PART I User s Guide ...
Page 16: ...16 ...
Page 30: ...Chapter 2 The Web Configurator VMG1312 B Series User s Guide 30 ...
Page 35: ...Chapter 4 Tutorials VMG1312 B Series User s Guide 35 7 Click Apply to save your settings ...
Page 77: ...77 PART II Technical Reference ...
Page 78: ...78 ...
Page 166: ...Chapter 9 Routing VMG1312 B Series User s Guide 166 ...
Page 184: ...Chapter 10 Quality of Service QoS VMG1312 B Series User s Guide 184 ...
Page 210: ...Chapter 13 Interface Group VMG1312 B Series User s Guide 210 ...
Page 226: ...Chapter 15 Firewall VMG1312 B Series User s Guide 226 ...
Page 232: ...Chapter 17 Parental Control VMG1312 B Series User s Guide 232 ...
Page 242: ...Chapter 19 Certificates VMG1312 B Series User s Guide 242 ...
Page 246: ...Chapter 20 Log VMG1312 B Series User s Guide 246 ...
Page 250: ...Chapter 21 Traffic Status VMG1312 B Series User s Guide 250 ...
Page 256: ...Chapter 24 IGMP Status VMG1312 B Series User s Guide 256 ...
Page 260: ...Chapter 25 xDSL Statistics VMG1312 B Series User s Guide 260 ...
Page 262: ...Chapter 26 User Account VMG1312 B Series User s Guide 262 ...
Page 268: ...Chapter 29 TR 064 VMG1312 B Series User s Guide 268 ...
Page 272: ...Chapter 30 Time Settings VMG1312 B Series User s Guide 272 ...
Page 278: ...Chapter 32 Logs Setting VMG1312 B Series User s Guide 278 ...
Page 296: ...Chapter 36 Troubleshooting VMG1312 B Series User s Guide 296 ...
Page 336: ...Appendix C Pop up Windows JavaScripts and Java Permissions VMG1312 B Series User s Guide 336 ...
Page 350: ...Appendix D Wireless LANs VMG1312 B Series User s Guide 350 ...
Page 374: ...VMG1312 B Series User s Guide 374 Index ...