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

Jan-Piet Mens jpmens.dns at gmail.com
Wed Jul 10 16:02:37 UTC 2013

> 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

        sudo ifconfig lo0 alias 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. :)


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