How to set up the internal network and the external network to access the dual network port network DVR?

In fact, whether it is Dahua, Hikvision or other well-known brands, its network settings are basically the same. The original intention of the dual network port design is nothing more than two purposes.
First: load balancing and fault tolerance. Because the frequency of the network hard disk recorders or storage servers of the large number of roads is getting higher and higher, the 64-channel and 128-channel hard disk recorders are moving, and the demand for the network transmission speed load balancing page is getting higher and higher.
Second: The same video recorder implements multi-address communication. Two different network ports can be connected to two different networks, that is, IPs of different network segments are set to access different LANs. For example, the trademark netizen asked, one to take the special line of the Environmental Protection Agency, one to pick up his current IPC network switch. In fact, in the multiple access mode, some brand models allow two network ports to set IP and gateway respectively, but DNS can only be shared. Of course, multiple different DNS can be set to meet different needs; while some brand models only allow one network card. Set the gateway, another network card can only set the IP, the gateway and the DNS must share another network card, this depends on different manufacturers to choose different product types.

Next, let's talk about setting up different network segments under normal circumstances to realize the settings for accessing the DVR at the same time:
In the multiple access state, one of the two network cards should be set as the default network card. Generally, the IP of one network card and the IP of the camera are in the same network segment, which meets the needs of accessing the camera data, while the IP address of the other network card is set. It is the LAN of the unit or company, which is convenient for intranet management. It can also view video and video, and at the same time separate the camera network segment and play a certain protective role.
Or the IP of one network card and the IP of the camera on the same network segment are the intranet IP, and the other network card is set to the external network IP. It is used to connect to the external network and separate the internal and external networks. It is also a security purpose. At this time, the network card connected to the external network. Set to default, as opposed to the previous method. The default network card is the network card to be connected to the external network. As for the fixed public network IP directly connected or dialed, the recorder is set separately, depending on the situation.
And fault tolerance and balance is equivalent to a network card, there is no separation protection.
In the multiple access setting, the client, whether it is APP or software, or WEB access, which IP card is used, as long as it is in the same network segment as the network card, of course, if there is no fixed IP in the external network, To set up dynamic domain name resolution DDNS, different vendors also have their own solutions, and can also use third-party resolution, as long as the bandwidth is allowed and the traffic is sufficient.

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