If camera and DVR's DDNS server is not I want ,how can I setup DDNS?

DDNS（Dynamic Domain Name Server), the role of DDNS is get the WAN IP. 

So we only have to set one DNS and then all the LAN equitment is work in this DDNS.

We can set in all the equitment support DDNS in LAN.like  DVR ,IP camera,PC and router.

If camera and DVR's DDNS server is not I want ,how can I setup DDNS?

Router is the best way to set DDNS,because router can buy in local ，the point is support  local DDNS server or popular DDNS server.

if also do not have the DDNS server you want,you only need to login the DDNS supplier‘s Web page and down the PC client and run it in arbitrarily PC in LAN.