[nsd-users] nsd can't bind udp socket: Address already in use

[Jan-Piet Mens]

> Okay, so you're on a Mac, where port 5353 is already in use by
> mDNSResponder. Just configure your NSD to use some other high-numbered port.

FWIW, you can also configure an additional loopback address on OSX as
follows:

        sudo ifconfig lo0 alias 127.0.0.2 up

That would allow you to run both Unbound and NSD on port 53, providing
you ensure they bind to the respective addresses you dole out. 

But this is a bit off topic: others here have already given you clean
solutions. :)

        -JP