Dahua Technology DH-PFR4K-E50 User Manual page 99

Change Default HTTP and Other Service Ports
5.
We suggest you to change default HTTP and other service ports into any set of numbers
between 1024~65535, reducing the risk of outsiders being able to guess which ports you
are using.
Enable HTTPS
6.
We suggest you to enable HTTPS, so that you visit Web service through a secure
communication channel.
MAC Address Binding
7.
We recommend you to bind the IP and MAC address of the gateway to the device, thus
reducing the risk of ARP spoofing.
Assign Accounts and Privileges Reasonably
8.
According to business and management requirements, reasonably add users and assign a
minimum set of permissions to them.
Disable Unnecessary Services and Choose Secure Modes
9.
If not needed, it is recommended to turn off some services such as SNMP, SMTP, UPnP,
etc., to reduce risks.
If necessary, it is highly recommended that you use safe modes, including but not limited to
the following services:
SNMP: Choose SNMP v3, and set up strong encryption passwords and authentication

passwords.
SMTP: Choose TLS to access mailbox server.

FTP: Choose SFTP, and set up strong passwords.

AP hotspot: Choose WPA2-PSK encryption mode, and set up strong passwords.

10. Audio and Video Encrypted Transmission
If your audio and video data contents are very important or sensitive, we recommend that
you use encrypted transmission function, to reduce the risk of audio and video data being
stolen during transmission.
Reminder: encrypted transmission will cause some loss in transmission efficiency.
11. Secure Auditing
Check online users: we suggest that you check online users regularly to see if the

device is logged in without authorization.
Check device log: By viewing the logs, you can know the IP addresses that were used

to log in to your devices and their key operations.
12. Network Log
Due to the limited storage capacity of the device, the stored log is limited. If you need to
save the log for a long time, it is recommended that you enable the network log function to
ensure that the critical logs are synchronized to the network log server for tracing.
13. Construct a Safe Network Environment
In order to better ensure the safety of device and reduce potential cyber risks, we
recommend:
Disable the port mapping function of the router to avoid direct access to the intranet

devices from external network.
The network should be partitioned and isolated according to the actual network needs.

If there are no communication requirements between two sub networks, it is
suggested to use VLAN, network GAP and other technologies to partition the network,
so as to achieve the network isolation effect.
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User's Manual