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I have a Security camera DVR that has its own IP address assigned to it. My ISP gives out IP addresses via DHCP. I can see my DVR and the camera views within my house with my PC and Samsung Galaxy tab but when I go to anyplace outside my internal network I cannot access it. I tried setting up port forwarding on my router but still no luck outside my network. Do I need to get a static IP from my ISP or can I get around this using DDNS? and how do I do it? I setup a trial DDNS here at dyn.com and put the DDNS hostname in that the DVR is named and I chose one of the extensions from the dropdown box. I wrote it down then I went to the IP address box and entered the IP address of the physical DVR and activated it. Should I have used the IP address of my external IP from my ISP in that box or the device IP? the IP will change when it renws since it is DHCP from my ISP will outside requests still know where to go if the IP changes. I also setup port forwarding on my router pointing to the DVR IP and also port forwading of ports 80 and 5000. I know I have a lot of questions here but want to know why I can't reach the DVR and camers from outside my network. Thanks
Answer by RotBlitz · Oct 26, 2012 at 11:13 PM
The purpose of DynDNS is to work with dynamic IP addresses. This is where the name comes from. (It works also with static IP addresses though.) The principle of DNS is that a hostname is resolved to an IP address, your public IP address in this case.