Dynamic DNS (basic questions)

AndyPix

kwikbreaks wrote: »

the loopback issue I mentioned. Try it from a phone not connected to the local WiFi. Of course it could also be you aren't using the correct external IP.

My money's on one of these 2

kwikbreaks

AndyPix wrote: »

That'll never work

Actually it does with some routers including my current one but not all which is why you need to avoid it when initially testing.

Anyhow good luck - I'm off to bed now.

esuhl

kwikbreaks wrote: »

Why 4 ports? Most CCTV only uses one or at most two for an alternate stream.

No idea. It's going to have a lot of cameras eventually. I think there are six currently active.

kwikbreaks wrote: »

External IPs don't usually change that frequently so you want to make sure that the ip fixing and port forwarding are correct before worrying about DDNS. Incidentally some cameras support DDNS themselves so worth checking there.

Ah! My mate said he thought the DDNS setup might have come with the cameras.

kwikbreaks wrote: »

Lastly don't rely on a router to work correctly on loopback as not all do - ie accessing myddns.org:8080 from within the network that ddns is pointing to may not work. Use a phone to check external access.

I'm not using any DDNS-related domain name to access anything. Is that how DDNS works...?

I'm at home, so I have external access from my own PC, and internal access via Teamviewer.

I'm not quite sure what I'm doing wrong, or what to check next...

I've just double-checked the external IP. It hasn't changed while I've been testing, and I copied/pasted it via TeamViewer. The same IP appeared in the router settings and via whatismyip.com, so I'm sure I have the right IP.

Thanks all for your help, btw. :-)

esuhl

Ah... I've just found the CCTV device settings application and the instruction manual!

Hopefully a good old RTFM will fix things!

Johnmcl7

I agree with the posts above, Samsung isn't a supported DDNS service I've seen on the router so I'd expect there's a device on the network that's updating the external DNS.

You've said you're not sure what the four ports are for, what rules are you setting up?

esuhl

Johnmcl7 wrote: »

I agree with the posts above, Samsung isn't a supported DDNS service I've seen on the router so I'd expect there's a device on the network that's updating the external DNS.

Yes -- it looks like the CCTV app has settings for DDNS. The protocol type is HiDDNS, and the server address is set to https://www.hik-online.com.

It's showing as disconnected and the username and password are blank. I don't have the login details now, but I'll get my mate to re-enter them to see if that helps.

Johnmcl7 wrote: »

You've said you're not sure what the four ports are for, what rules are you setting up?

My friend had written down the ports used as "554, 8000, and 8080 or 8181" (his words). I set up incoming rules to allow TCP/UDP connections on those ports to the IP address of the CCTV hub.

Looking in the CCTV settings application, port 554 is labelled "RTSP", port 8000 is "server" and 8080 is "HTTP". There's no mention of port 8181.

I think I'm getting somewhere -- thanks again. I'll have another look tomorrow.

Johnmcl7

It sounds like perhaps something else on the network was using the Samsung dynamic dns? I've not used their DDNS so I'm not at all familiar with it, if only the router has changed then whatever was updating the DNS should carry on doing it if it's back on the new network as it's simply sending the current IP address to an external system.

That makes sense with regards to the ports you're forwarding, there's better tools for it but if you want a quick way to check if those firewall ports are open you can use telnet:

http://blog.industrialnetworking.com/2011/09/using-telnet-to-test-open-ports.html

esuhl

Johnmcl7 wrote: »

It sounds like perhaps something else on the network was using the Samsung dynamic dns?

No -- I think that the Samsung-related name is what he was told his DDNS username was... or something...?

He won't have anything else using DDNS. He has Sky TV and a games console or two, but (apart from the CCTV), it's just normal Ethernet and Wifi from a domestic Sky router.

Johnmcl7 wrote: »

I've not used their DDNS so I'm not at all familiar with it, if only the router has changed then whatever was updating the DNS should carry on doing it if it's back on the new network as it's simply sending the current IP address to an external system.

That makes sense with regards to the ports you're forwarding, there's better tools for it but if you want a quick way to check if those firewall ports are open you can use telnet:

http://blog.industrialnetworking.com/2011/09/using-telnet-to-test-open-ports.html

Hmmm... When I test from my PC over the internet, I get a blank screen when I telnet the ports -- indicating that they are, indeed, open.

System

Hi

Changed ISP, and still has the old router?

Consider re-building the camera setup with the old router and note down settings etc.

Try and connect the Samsung parts to the new router and see if they will route, you should be able to access the cameras from the new router across the to the old, as if it was an external network, but is actually local.

192.168.0.xxx and 198.162.100.xxx

rtho782

I imagine his cameras are samsung cameras and the old DNS was part of the samsung camera software.

Depending on his ISP, his IP address (even if dynamic) is likely pretty static in reality (unless he does silly things like turning his router off at night). You might not even need dynamic dns.

I've had the same IP on plusnet for about 3 years. Same with my Virgin Media connection.