Dahua XVR User Manual page 108

 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 3-102.
Important:
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.
3.11.2.11 SNMP
Figure 3-101
Figure 3-102
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