Internal port：Port that has been mapped in the router.
External port：Port that has been mapped locally.
Default: UPNP default port setting is the HTTP, TCP and UDP of the DVR.
Add to the list: Click it to add the mapping relationship.
Delete: Click it to remove one mapping item.
Double click one item; you can change the corresponding mapping information. See
Figure 4-126.
Note
When you are setting the router external port, please use 1024~5000 port. Do not use
well-known port 1~255 and the system port 256~1023 to avoid conflict.
For the TCP and UDP, please make sure the internal port and external port are the same
to guarantee the proper data transmission.
Figure 4-125
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