Errors When trying to install Monocle-Gateway.exe

Monocle

In the startup of the log file look for the “FQDN” entry. This is the unique hostname that is assigned to your gateway instance and registered as a publicly resolvable DNS entry.
Open a command prompt on your Windows machine and enter the following command:

nslookup xxx.mproxy.io

(where xxx.mproxy.io is your FQDN.)

It should return a result with your gateway’s local IP address. 192.168.0.110

If you don’t get this IP address, then something is blocking the DNS resolution of that domain name. Most likely your router or DNS server is blocking resolutions to local IP addresses (DNS REBIND).

Make sure to try this nslookup test on the gateway machine as well as another computer on the same network if possible. Basically we are trying to make sure that the Alexa devices on the network would also be able to resolve this hostname by simulating the DNS resolution from another device attached to the network.

Let’s start with this test and see what happens.

Thanks, Robert

pedenfield

I think I have the FQDN number right.

pedenfield

2nd computer result

C:\Users\Gerri>nslookup 2b49b758-a6fd-4a36-a6ac-29b674ff1ce5.mproxy.io
Server: UnKnown
Address: 192.168.0.1

*** No internal type for both IPv4 and IPv6 Addresses (A+AAAA) records available for 2b49b758-a6fd-4a36-a6ac-29b674ff1ce5.mproxy.io

C:\Users\Gerri>nslookup 192.168.0.110
Server: UnKnown
Address: 192.168.0.1

*** UnKnown can’t find 192.168.0.110: Non-existent domain

pedenfield

192.168.0.118 computer is now showing this

C:\Users\Paul>nslookup 2b49b758-a6fd-4a36-a6ac-29b674ff1ce5.mproxy.io
Server: UnKnown
Address: 192.168.0.1

*** No internal type for both IPv4 and IPv6 Addresses (A+AAAA) records available for 2b49b758-a6fd-4a36-a6ac-29b674ff1ce5.mproxy.io

Monocle

@pedenfield

So this confirms that DNS is the issue.

Here is what I get when attempting the same test:

$ nslookup 2b49b758-a6fd-4a36-a6ac-29b674ff1ce5.mproxy.io
Server:		172.20.10.1
Address:	172.20.10.1#53

Non-authoritative answer:
Name:	2b49b758-a6fd-4a36-a6ac-29b674ff1ce5.mproxy.io
Address: 192.168.0.110

So you see, I’m getting the actual resolved address of 192.168.0.110 which is correct.

You can also try the same command using Google DNS server at 8.8.8.8:

$ nslookup 2b49b758-a6fd-4a36-a6ac-29b674ff1ce5.mproxy.io 8.8.8.8
Server:		8.8.8.8
Address:	8.8.8.8#53

Non-authoritative answer:
Name:	2b49b758-a6fd-4a36-a6ac-29b674ff1ce5.mproxy.io
Address: 192.168.0.110

So the issue is most likely your router which I assume is at address 192.168.0.1 based on your previous attempts.
The router is probably blocking resolution of the DNS hostname to a local IP address.
You will need to lookup instructions for how to allow a specific hostname (2b49b758-a6fd-4a36-a6ac-29b674ff1ce5.mproxy.io) to be allowed and not blocked.

Thanks, Robert

pedenfield

Thanks. I will do some checking and let you know what I find. You have been most helpful…

Monocle

@pedenfield

When trying to research this for your router, the keyword “DNS REBIND” or “DNS REBINDING” is what this behavior is typically called. It’s a security measure that some routers implement.

Thanks, Robert

pedenfield

@pedenfield said in Errors When trying to install Monocle-Gateway.exe:

nslookup 2b49b758-a6fd-4a36-a6ac-29b674ff1ce5.mproxy.io

Using Google it the lookup works

C:\Users\Paul>nslookup 2b49b758-a6fd-4a36-a6ac-29b674ff1ce5.mproxy.io 8.8.8.8
Server: dns.google
Address: 8.8.8.8

Non-authoritative answer:
Name: 2b49b758-a6fd-4a36-a6ac-29b674ff1ce5.mproxy.io
Address: 192.168.0.110

pedenfield

@Monocle said in Errors When trying to install Monocle-Gateway.exe:

2b49b758-a6fd-4a36-a6ac-29b674ff1ce5.mproxy.io

Ping works also

C:\Users\Paul>ping 2b49b758-a6fd-4a36-a6ac-29b674ff1ce5.mproxy.io

Pinging 2b49b758-a6fd-4a36-a6ac-29b674ff1ce5.mproxy.io [192.168.0.110] with 32 bytes of data:
Reply from 192.168.0.110: bytes=32 time<1ms TTL=128
Reply from 192.168.0.110: bytes=32 time<1ms TTL=128
Reply from 192.168.0.110: bytes=32 time<1ms TTL=128
Reply from 192.168.0.110: bytes=32 time<1ms TTL=128

Ping statistics for 192.168.0.110:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

Monocle

@pedenfield

The Google lookup worked so that means that your assigned FQDN is valid and publicly resolvable.
However, once you resolved it, it is now cached for a little while on your local system/computer.

The ping is now working because the DNS hostname is now cached on your local machine.
If you go back and try to resolve it again after a while (without the Google DNS server) just using your default DNS servers, it will probably fail to resolve the hostname again.

You can use the following command to force a flush of your local DNS cache (on Windows).

ipconfig /flushdns

I don’t see a way to manually add additional DNS servers to the Alexa Echo device, so the FQDN will need to be resolvable by your router.

Thanks, Robert

pedenfield

You are exactly right; but you knew that. During that short time i was able to see 2 cameras on the spot but not the tablet. I’ll keep working.

Monocle

@pedenfield

Also, some routers will allow you to simply override a DNS host to a fixed address of your choosing. This could also be an option for you if your router allows that. You would just use the hostname 2b49b758-a6fd-4a36-a6ac-29b674ff1ce5.mproxy.io and have it pointed to the gateway’s IP address (192.168.0.110). So instead of the router actually resolving the address from a public DNS record, it just returns the overridden IP locally.

Thanks, Robert