ZyXEL Communications ARMOR G5, User Manual, Page: 92 / 186

Chapter 9 WAN
NBG7815 User’s Guide
92
The following table describes the labels in this screen.
9.6 Pa ssthro ug h Sc re e n
Use this screen to change your NBG7815’s ALGs and VPN pass-through settings. Click
Se tting s
>
Inte rne t
>
Pa ssthro ug h
to show the following screen.
ALG O ve rvie w
Application Layer Gateway (ALG) allows the following applications to operate properly through the
NBG7815’s NAT.
• SIP - Session Initiation Protocol (SIP) - An application-layer protocol that can be used to create voice
and multimedia sessions over Internet.
• H.323 - A teleconferencing protocol suite that provides audio, data and video conferencing.
• FTP - File Transfer Protocol - an Internet file transfer service.
• SNMP - Simple Network Management Protocol - An application-layer protocol that can be used to
exchange management information between network devices.
• RTSP - Real Time Streaming Protocol - An application-layer protocol that can be used to stop, pause
or play video and audio applications streaming on the Internet.
• IRC - Internet Relay Chat - An application-layer protocol that can control the relay chat applications
and allow clients to have real-time communications with others on the Internet.
The ALG feature is only needed for traffic that goes through the NBG7815’s NAT.
Table 26 Add Port Forwarding Rule
LABEL DESC RIPTIO N
Service Name Select a pre-defined service from the drop-down list box. The pre-defined service
port number(s) and protocol will be displayed in the port forwarding summary table.
Otherwise, select
Use r- De fine
to manually enter the port number/range and select
the
Pro to c o l
.
Protocol Select the transport layer protocol supported by this virtual server. Choices are
TC P
,
UDP
, or
TC P_UDP
.
If you have chosen a pre-defined service in the
Se rvic e Na m e
field, the protocol will
be configured automatically.
External Port This shows the port number used to connect to this service using the router's external
IP address on the WAN.
If you select
Use r- De fine
in the
Se rvic e Na m e
field, enter the port number(s)
manually.
Device List Select the internal IP address of the virtual server.
Internal Port This shows the port number used to connect to this service using the server's internal
IP address on the LAN.
If you select
Use r- De fine
in the
Se rvic e Na m e
field, enter an internal port number
manually or leave the field blank for port range forwarding.
Apply Click
Apply
to save your changes.
Cancel Click
C a nc e l
to exist this screen without saving.