Huawei BM2022, Руководство пользователя

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Chapter 7 Network Setting
BM2022 Users Guide
107
7.12.2 Trigger Port Forwarding Example
The following is an example of trigger port forwarding. In this example, J is Janes computer and S
is the Real Audio server.
Figure 49 Trigger Port Forwarding Example
1
Jane requests a file from the Real Audio server (port 7070).
2 Port 7070 is a trigger port and causes the BM2022 to record Janes computer IP address. The
BM2022 associates Jane's computer IP address with the "incoming" port range of 6970-7170.
3 The Real Audio server responds using a port number ranging between 6970-7170.
4
The BM2022 forwards the traffic to Janes computer IP address.
5
Only Jane can connect to the Real Audio server until the connection is closed or times out. The
BM2022 times out in three minutes with UDP (User Datagram Protocol), or two hours with TCP/IP
(Transfer Control Protocol/Internet Protocol).
Two points to remember about trigger ports:
1
Trigger events only happen on data that is coming from inside the BM2022 and going to the
outside.
2
If an application needs a continuous data stream, that port (range) will be tied up so that another
computer on the LAN cant trigger it.
7.13 DMZ
Use this page to set the IP address of your network DMZ (if you have one) for the WiMAX Device.
All incoming packets received by this BM2022s WAN interface will be forwarded to the DMZ host
you set.
Click Network Setting > NAT > DMZ to open this screen as shown next.