[Pdns-users] How to set up pdns to allow NOTIFY, supermaster, and recursion to work?

[Brian Candler]

On 03/11/2019 22:42, Steve Shipway wrote:
> I've tried adding a second IP to the DNS server and placing the 
> resolver on that, so that I can set up notify to send to this as an 
> additional IP, but this again breaks and becomes problematic as we 
> then have 2 IPs for a single nameserver.

That's basically what you need to do with pdns.

In large ISP deployments, with thousands or millions of domains, 
combining recursor and resolver results in major problems.  Hence pdns 
decided to stop supporting such configurations entirely.

In small enterprise deployments, where you control the clients as well 
as the domains, a combined setup may work acceptably well. But 
personally I'd keep them separate even in the smallest of deployments.

"Separate" could mean binding the two processes to different IPs on the 
same server; or it could mean using containers (lxd/docker) or VMs on 
the same server; or it could mean physically different servers.  The 
choice depends on your scale.

Regards,

Brian.