Same site, 2 addresses - one doesn't work

I have 2 BQMs which refer to the same site - my home server.
One is addressed via DDNS.net - it works fine.

The other uses a 'home.' subdomain on my hosted website. The subdomain is pointed to my home IP address. Entering the subdomain web address in a browser works fine.
But the BQM does not display - the panel is greyed-out with "NO DATA" in front.

I can's see any info about what might cause this.
Any help appreciated.

Thanks, AB

I think this is basically the same question about using BQM on a subdomain: https://forums.thinkbroadband.com/bqm/f/4779750-bqm-...

As I understand it the Ping request from the BQM would be sent to your router's external IP address and the router will respond to the Ping... in some routers it may be possible to direct the Ping through to an internal server. But Ping operates at the IP address level, Layer3.
Generally in the consumer set up the Ping goes to the router which responds without passing it through to any internal servers, you should ask the ThinkBroadband team specifically how BQM tries to resolve a subdomain... but you send a Ping to an IP address so unless your subdomain has it's own different external IP address you won't be able to reach it with a Ping request from an external server.

Thanks for this.
I don't see how the fact it's a subdomain should affect this;
- the DDNS.net address resolves to my home IP - and the BQM for that address works OK
- the web address for my subdomain also resolves to my home IP address but that BQM does not work.

Clearly there IS a difference, but I can pingboth addreses, and both resolve to the same IP....

Thanks,
AB

In reply to a post by ACC_B:

Clearly there IS a difference, but I can pingboth addreses, and both resolve to the same IP....

Most likely when the BQM queries your DDNS.net service it does not respond, perhaps it thinks the BQM is abusing the service? I found the ASUS router built in DDNS service stopped working with BQM years ago, and now I use a third party instead.

I assume your web address for your subdomain (e.g. myhome.myname.uk) is using a different type of Dynamic DNS or you are lucky to have a fixed IP broadband.

You've found an incompatibility on the internet, and have a workaround, don't sweat it.

Thanks for the reply.

It's the DDNS.net address that works.
The subdomain DNS is handled by my web host, and the home.* subdomain
- pings successfully (resolves to my home IP),
- displays the correct page on a browser,
but gives 'NO DATA' on the BQM panel.

AB

It is probably worth asking the thinkbroadband team if there is an issue with how BQM is trying to resolve subdomains. You can send them an email here: [email protected]

As I noted earlier there was a recent thread on the same topic, so there might be some anomaly on how BQM resolves the URL to an IP....
But as discussed it will resolve to the same IP address and get responded to by the router, so it could be a waste of effort sorting out the subdomain.

I'll take your advice and pursue it.

But I don't think I've made it clear - the router is responding to the BQM request correctly - for either the IP address itself, or for the ddns.net dynamic address. It's only when I give BQM the 'home' subdomain, that it fails. So I don't think it's to do with how the router is responding.

Agreed... it looks like it is how BQM is trying to resolve the URL. However I was trying to say that when it works the router will be responding to subdomain as well as your ddns address (unless you have a different external IP address for the subdomain) so I can't see the benefit of being able to use BQM to graph the subdomain as well. In fact reading the BQM FAQ I suspect that BQM would recognize that the subdomain (if it worked) is resolving to an IP address for which there is already a BQM set up (on the ddns.net address) and would reject it anyway.

But I am guessing a bit and it would be best to contact the "team" to get their response.

In reply to a post by Bam16:

... In fact reading the BQM FAQ I suspect that BQM would recognize that the subdomain (if it worked) is resolving to an IP address for which there is already a BQM set up (on the ddns.net address) and would reject it anyway.

But I am guessing a bit and it would be best to contact the "team" to get their response.

Not necessary to contact the team for this. Your hypothesis can be tested by removing the BQM for the router or the main domain

In reply to a post by ACC_B:

The subdomain DNS is handled by my web host, and the home.* subdomain
- pings successfully (resolves to my home IP),
- displays the correct page on a browser,
but gives 'NO DATA' on the BQM panel.

As you don't give specifics, lets make some assumptions. I assume you are using shared hosting, and you have delegated the domain name (lets use madeup.co.uk) to the shared hosting provider who give you a DNS control panel. You have configured a host of "home.madeup.co.uk" to point to your broadband IP, and asking the BQM to ping the home.madeup.co.uk domain. I also assume you have a home broadband with a frequently changing IP so you can't simple set up an A record for this, but are using a service of the shared hosting company to act as a dynamic DNS provider.

It is quite possible the ThinkBroadband BQM "pingbox" (the firebrick) is doing a DNS query for your IP more often than the shared hosting provider thinks is reasonable, and so they chose not to reply.

The fact it works with other DNS providers means this can't be an issue with the BQM, it is a choice the DNS service provider has made to not respond. They may assume the BQM is something malicious due to high volume.