ZyXEL P-660HN-51 User Guide - Page 145

The ALG Screen

Page 145 highlights

Chapter 9 Network Address Translation (NAT) Table 45 Network > NAT > Address Mapping: Edit (continued) LABEL DESCRIPTION Global End IP This is the ending global IP address (IGA). This field is N/A for One-toOne, Many-to-One and Server mapping types. Server Click this link to go to the Port Forwarding screen to edit a port Mapping Set forwarding set that you have selected in the Server Mapping Set field. Edit Details Back Apply Cancel Click this to return to the previous screen without saving. Click this to save your changes. Click this to restore your previously saved settings. 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. Table 46 Network > NAT > ALG LABEL DESCRIPTION Enable SIP ALG Select this to make sure SIP (VoIP) works correctly with portforwarding and address-mapping rules. Apply Click this to save your changes. Reset Click this to restore your previously saved settings. P-660HN-TxA User's Guide 145

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225
  • 226
  • 227
  • 228
  • 229
  • 230
  • 231
  • 232
  • 233
  • 234
  • 235
  • 236
  • 237
  • 238
  • 239
  • 240
  • 241
  • 242
  • 243
  • 244
  • 245
  • 246
  • 247
  • 248
  • 249
  • 250
  • 251
  • 252
  • 253
  • 254
  • 255
  • 256
  • 257
  • 258
  • 259
  • 260
  • 261
  • 262
  • 263
  • 264
  • 265
  • 266
  • 267
  • 268
  • 269
  • 270
  • 271
  • 272
  • 273
  • 274
  • 275
  • 276
  • 277
  • 278
  • 279
  • 280
  • 281
  • 282
  • 283
  • 284
  • 285
  • 286
  • 287
  • 288
  • 289
  • 290
  • 291
  • 292
  • 293
  • 294
  • 295
  • 296
  • 297
  • 298
  • 299
  • 300
  • 301
  • 302
  • 303
  • 304
  • 305
  • 306
  • 307
  • 308
  • 309
  • 310
  • 311
  • 312
  • 313
  • 314
  • 315
  • 316
  • 317
  • 318
  • 319
  • 320
  • 321
  • 322
  • 323
  • 324

Chapter 9 Network Address Translation (NAT)
P-660HN-TxA User’s Guide
145
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.
Global End IP
This is the ending global IP address (IGA). This field is
N/A
for
One-to-
One
,
Many-to-One
and
Server
mapping types.
Server
Mapping Set
Edit Details
Click this link to go to the
Port Forwarding
screen to edit a port
forwarding set that you have selected in the
Server Mapping Set
field.
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.