Can video surveillance devices be deployed on different networks?

Yes, my friend.
What you're saying is that this situation can be achieved.

You can use the NAT.

Network Address Translation (NAT) is a technology that can translate the IP address in an IPv4 packet header to another IP address. When the IVS1800 is on a different network from the upper-level video/image management platform (for example, IVS3800) or cameras, the NAT technology can be used to translate the private IP address in an IPv4 packet header to a public IP address so that the IVS1800 can connect to the upper-level video/image management platform or cameras.

Application Scenarios

The typical NAT application scenarios are as follows:

• NAT between the iClient and IVS1800: When the iClient and IVS1800 are on different networks, you cannot log in to the iClient using the IP address of the IVS1800. If you need to log in to the iClient to perform service operations, the IP address of the IVS1800 needs to be translated.

  Assume that the iClient (10.10.10.20) and IVS1800 (192.168.10.10) are on networks 1 and 2 respectively and the two networks cannot communicate with each other. If you need to access the IVS1800 through the iClient, an NAT device, such as a firewall or a router, can be used to translate the IVS1800 IP address into an IP address on network 1 so that you can access the IVS1800 through the iClient

  
  

  

• NAT between the IVS1800 and upper-level video/image management platform: If the IVS1800 and upper-level video/image management platform (for example, IVS3800) are on different networks, the IVS1800 cannot register with the upper-level video/image management platform. In this case, you cannot view live or recorded video from cameras connected to the IVS1800 on the upper-level video/image management platform.
  

  Assume that the IVS1800 and upper-level video/image management platform are on networks 2 and 4 respectively and the two networks cannot communicate with each other. If you need to view live or recorded video from cameras connected to the IVS1800 on the upper-level video/image management platform, the IP address of the IVS1800 needs to be translated so that it can register with the upper-level video/image management platform.

  

• NAT between the IVS1800 and cameras: If the IVS1800 and cameras are on the different networks, the IVS1800 cannot connect to the cameras.

  Assume that the IVS1800 and cameras are on networks 2 and 6 respectively and the two networks cannot communicate with each other. You need to translate the IP address of the IVS1800 so that the cameras can connect to the IVS1800.

  

If the cameras are on an extranet and the IVS1800 is on an intranet, you need to translate the IP address and port number of the IVS1800 to an extranet IP address and port number for the iClient to access.

Based on the IP address and port number translation example, you need to perform the following configurations (using ONVIF):

1. Plan the following configuration items:

• Require Configuration on the NE
  

• Pre-NAT IP Address
  

• Post-NAT IP Address
  

• Pre-NAT Port
  

• Post-NAT Port
  

Configuring NAT on the Firewall.

Configuring NAT on the IVS1800.

For details, see https://support.huawei.com/hedex/hdx.do?docid=EDOC1100199135&id=EN-US_TOPIC_0000001072045737&lang=en

Other protocols, such as HWSDK and GB/T 28181, can also be implemented.