Can't add network DNS to General DNS List

[p_bath_uk]

Hi,

I have two pfSense boxes A & B back to back on a network linking the internet with a secure network.

I wand box A to use the DNS service advertised on box B. I can manually force nslookup on box A to lookup on box B and all works. However when I try and put the DNS entry for box B in the general settings for Box A I get problems.

Firstly, box A refuses to allow me to apply the DNS setting as it complains the DNS server IP is on a connected network. I set the DNS gateway option to "none" thinking it would use default routing but it seems to turn it off.

Can someone help me understand how I get Box A to use the DNS service from Box B?

Thanks,

PT

[johnpoz]

Back to back?  Like a double nat setup?  Or is one pfsense just a downstream router in your network..

Out of the box pfsense would be using the resolver and putting an IP in the general setup is going to do nothing..

Drawing of your network would be fantastic.  And what exactly your doing for dns on the pfsense boxes.  Resolver, forwarder?  Resolver in forwarder mode?  So this box b pfsense is the dns for your whole local network?

Going to need more details to help.