DNS problem (perhaps)?

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Hi all

We have a web page that uses the openstreetmap API to do reverse geocode lookups.
However, it has just stopped working; been running for years but stopped a couple of days ago.

The API call we use is something like 'http://nominatim.openstreetmap.org/reverse?lat=51.5484&lon=-2.26594'
I can see the results OK from my phone so the site is up and running but not from any browsers on our network.
All we get if we try to query it is 'Internet explorer could not connect to ....

We do have our own DNS servers but I confess I do not know an awful lot about these things.

Is it possible that our DNS server is unable to resolve the URL?
If so, is there a way to make it rebuild the indexed or whatever?
Is there a test that I can do to prove that this is where the problem is?

Or is it possible that they have blocked us?
Again, is there a test I can do or somewhere I can look?

Any help or suggestions gratefully accepted.

Posted 12-Aug-14 22:31pm

dnibbo

Updated 12-Aug-14 22:32pm

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OriginalGriff 13-Aug-14 4:45am

This may seem silly, but have you tried a different browser?
Reason I ask is I had that problems start a few days ago with a different website in Chrome, and IE can open it ok. (I still haven't got to the bottom of why not, but Chrome reports a ERR_CONTENT_LENGTH_MISMATCH problem)
I just tried the example URL you gave and it works in both Chrome and IE here.

dnibbo 13-Aug-14 4:53am

Thanks for the reply. I did try chrome and get:
Google Chrome could not load the web page because nominatim.openstreetmap.org took too long to respond. The website may be down or you may be experiencing issues with your Internet connection.

I guess that means it has resolved the URL; so the question now is why does it time out when accessed via browsers on our network but works on a phone with hardly any reception?

OriginalGriff 13-Aug-14 4:54am

Out of interest what DNS server are you using?

dnibbo 13-Aug-14 5:00am

we have our own Windows server 2008 R2

OriginalGriff 13-Aug-14 5:17am

No, no - are you using Google DNS on 8.8.8.8, or OpenDNS on 208.67.222.222, or ...

dnibbo 13-Aug-14 5:23am

Ha... as I said this is not really my area.
I though having our own DNS servers meant that we did not use Google/OpenDNS etc.
How can I find out which one we are using?

OriginalGriff 13-Aug-14 6:45am

Control panel, Network and sharing centre, Change adapter settings.
Right click the LAN connection and select "Properties"
Click "Internet Protocol Version 4", and press "Properties"
It's at the bottom of the "General" tab.

dnibbo 13-Aug-14 7:18am

That just confuses me more.
My PC is pointing to our DNS server.
The DNS server is pointing to 127.0.0.1 which is the local host is it not?

OriginalGriff 13-Aug-14 7:30am

No - 127.0.0.1 is a loopback address: it connects you to you and you only!

A thought: can you access it from a tablet via wifi?

dnibbo 13-Aug-14 7:56am

No, that's the odd bit.
If I use my phone it is OK on 3g but when connect to the Wi-Fi here and then it times out like the PC does. All other sites are OK.

OriginalGriff 13-Aug-14 8:52am

Not ignoring you - thinking.
I may be some time...

dnibbo 13-Aug-14 9:24am

No problem. I really appreciate your taking the time for me.
I am starting to think that they have blocked us for over-usage.

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