Unbound wont resolve domains using localhost

haberdabers

Hi,

I have a client who has come across a weird problem I haven't seen before and I am not sure how to fix. A couple of domains they use resolve to 127.0.0.1 as the app is running locally on there computers. When I do a lookup for the domain i.e "loop.foo.com" pfsense doesnt resolve it (also tried locally within the webgui). When I try direct to google dns from my phone it works. I added a static entry in pfsense for the domain and it works as it should, so I have a temporary workaround.

The set up is a single VM in ESXI running Unbound and pfblocker with openDNS as the external dns.

Any ideas where the problem could be?

tldr: If the domain resolves to 127.0.0.1 it fails when going through pfsense.

johnpoz

@haberdabers said in Unbound wont resolve domains using localhost:

If the domain resolves to 127.0.0.1 it fails when going through pfsense.

Well that would be a rebind, so no unbound will not return that..

You would need to disable rebind protection, or set that domain as private so it would not do rebind protection on it.

https://docs.netgate.com/pfsense/en/latest/services/dns/rebinding.html

haberdabers

Thanks Johnpoz. Just found the issue when you posted. I have entered the domain into the advanced options using "private-domain: foo.com" and all is good again.

https://blog.jenningsga.com/pfsense-dns-resolver-and-private-domains/

Thanks once again.

Gertjan

@haberdabers

dig loop.foo.com A +short
34.206.39.153

That's not 127.0.0.1.

Btw : I'm using default resolver settings.

edit : Google agress with me :

dig @8.8.8.8 loop.foo.com A +short
34.206.39.153

johnpoz

I take it his foo.com was just a placeholder, I don't think that was his actual domain ;)

haberdabers

It was a placeholder . Amazed someone had registered it.

Gertjan

@haberdabers said in Unbound wont resolve domains using localhost:

Amazed someone had registered it.

Your fault.
You mentioned it, they bought it quickly so you have to negotiate now ;)