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isy.universal-devices.com address to IP translation


jimbarstow

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When I hooked up my ISY, it got its IP address from my ISP, NOT my router. In spite of not having a local DNS, I can get to the ISY by name, "http://isy.universal-devices.com/99i/".I need to do this for another server that will be talking to the ISY but can't figure out how they did it. In my research, none of the solutions fit the environment that I'm running in. (Apple Airport Extreme in bridge mode to my ISP DHCP server.)  Any idea how the ISY does this?

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If ISP modem / router has been bridged this prevents a double NAT situation. Bridging a modem / router also allows you to install a more powerful router with more features. People also do this to extend their WiFi network to provide more coverage.

 

The DNS based on your reply, is being handled by the ISP Modem / router.

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Hi jimbarstow,

 

The http://isy.universal-devices.comURL is NOT the IP address of your ISY. The only thing it does is to bring up the Admin Console that searches your LOCAL network for ISY. 

 

ISY in no way shape or form accessible remotely (on the Internet) UNLESS:
1. You create port forwarding rules in your router

2. Use a portal solution such as MobiLinc

 

With kind regards,

Michel

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Hi jimbarstow,

 

The http://isy.universal-devices.comURL is NOT the IP address of your ISY. The only thing it does is to bring up the Admin Console that searches your LOCAL network for ISY. 

 

ISY in no way shape or form accessible remotely (on the Internet) UNLESS:

1. You create port forwarding rules in your router

2. Use a portal solution such as MobiLinc

 

With kind regards,

Michel

 

 

In poking around I noticed that the actual name is "isy994-ems". So what is "isy.universal-devices.com"? And by what process does it get translated into the correct ip address? It can't be pushed out the the ISP's DNS so where is that name resolution occurring?

 

I'd like to know because I'm gathering information from a bunch of sensors hooked up to arduino micro controllers. I'd like to be able to push/pull data

between the ISY and the arduinos but I can't have any hard-coded IP addresses.  I have almost everything working independently and am stuck on the IP address issue.

 

I'm hoping the answer is something I missed, such as we use "xyz" protocol. So far I've investigated local DNS servers (nope), IP reservations on the router (nope), routing tables (don't think so), etc.

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Hi jimbarstow,

 

ISY994-EMS is the DHCP name for ISY and the associated local IP address.

 

Again, I have to stress that you can NOT get to ISY using isy.universal-devices.com. That URL is only for downloading the applet/application and that's it. Nothing goes through isy.universal-devices.com .

 

With kind regards,

Michel

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Hi jimbarstow,

 

ISY994-EMS is the DHCP name for ISY and the associated local IP address.

 

Again, I have to stress that you can NOT get to ISY using isy.universal-devices.com. That URL is only for downloading the applet/application and that's it. Nothing goes through isy.universal-devices.com .

 

With kind regards,

Michel

Understood. 

 

I'll run an experiment tonight to see if the arduino network interface can handle a name (isy994-ems NOT isy.universal-devices.com) instead of a raw ip address to set variables via your REST interface.

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