Dahua DHI-NVR5208-4KS2 User Manual page 316

Parameter
Type
Mode
Add
IP Address
Start Port
End Port
Start Address
End Address
MAC Address
Step 4 Click Apply to complete the settings.
4.14.3.2 System Service
You can enable or disable the system internal services.
Step 1 Select Main Menu > SYSTEM > SECURITY > System Service.
The System Service interface is displayed. See Figure 4-237.
Description
In the Type list, you can select Network Access, Sync
Time-Whitelist, Forbid Ping and Semi Join.
 Network Access: Configure access right of IP host.
Sync Time-Whitelist: Allow designated IP host to synchronize

or change Device time. Prevent multiple IP hosts from
synchronizing system time with one Device repeatedly.
Forbid Ping: The Device does not respond to Ping requests.

 Semi Join: Protect Device operation from hacker attack.
Mode can be configured when Type is Network Access.
If Trusted Sites is enabled, you can visit device port

successfully with IP/MAC hosts in Trusted Sites.
 If Blocked Sites is enabled, you cannot visit device port with
IP/MAC hosts in Blocked Sites.
When Type is Network Access, you can configure IP Address, IP
Segment and MAC Address.
Enter IP Address, Start Port and End Port that is allowed or
forbidden.
When Type is IP Address, they can be configured. Start Port and
End Port can be configured only in Network Access Type.
Enter Start Address and End Address of IP Segment.
When Type is IP Segment, they can be configured.
Enter MAC Address that is allowed or forbidden
When Type is MAC Address, it can be configured.
Table 4-67
Local Basic Operation 305