ZyXEL P-870MH-C1 User Guide - Page 157

Technical Reference, Table 45

Page 157 highlights

Chapter 8 Network Address Translation (NAT) Use this screen to enable or disable the SIP (VoIP) ALG in the Device. To access this screen, click NAT > ALG. Figure 77 NAT > ALG Each field is described in the following table. Table 45 NAT > ALG LABEL DESCRIPTION Enable SIP ALG Select this check box to allow SIP sessions to pass through the Device. SIP is a signaling protocol used in VoIP (Voice over IP), the sending of voice signals over Internet Protocol. Apply Click Apply to save your customized settings. 8.7 Technical Reference The following section contains additional technical information about the Device features described in this chapter. Port Forwarding: Services and Port Numbers The most often used port numbers are shown in the following table. Please refer to RFC 1700 for further information about port numbers. Please also refer to the Supporting CD for more examples and details on port forwarding and NAT. Table 46 Services and Port Numbers SERVICES ECHO FTP (File Transfer Protocol) SMTP (Simple Mail Transfer Protocol) DNS (Domain Name System) Finger HTTP (Hyper Text Transfer protocol or WWW, Web) POP3 (Post Office Protocol) NNTP (Network News Transport Protocol) SNMP (Simple Network Management Protocol) PORT NUMBER 7 21 25 53 79 80 110 119 161 P-870HN-5xb User's Guide 157

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Chapter 8 Network Address Translation (NAT)
P-870HN-5xb User’s Guide
157
Use this screen to enable or disable the SIP (VoIP) ALG in the Device. To access
this screen, click
NAT > ALG
.
Figure 77
NAT > ALG
Each field is described in the following table.
8.7
Technical Reference
The following section contains additional technical information about the Device
features described in this chapter.
Port Forwarding: Services and Port Numbers
The most often used port numbers are shown in the following table. Please refer
to RFC 1700 for further information about port numbers. Please also refer to the
Supporting CD for more examples and details on port forwarding and NAT.
Table 45
NAT > ALG
LABEL
DESCRIPTION
Enable SIP ALG
Select this check box to allow SIP sessions to pass through the Device.
SIP is a signaling protocol used in VoIP (Voice over IP), the sending of
voice signals over Internet Protocol.
Apply
Click
Apply
to save your customized settings.
Table 46
Services and Port Numbers
SERVICES
PORT NUMBER
ECHO
7
FTP (File Transfer Protocol)
21
SMTP (Simple Mail Transfer Protocol)
25
DNS (Domain Name System)
53
Finger
79
HTTP (Hyper Text Transfer protocol or WWW, Web)
80
POP3 (Post Office Protocol)
110
NNTP (Network News Transport Protocol)
119
SNMP (Simple Network Management Protocol)
161