Stopping name server abuse

[Mukund Sivaraman]

On Sun, Jun 24, 2018 at 04:30:08PM -0400, Alex wrote:
> Hi,
> We had a former customer who parked about 300 domains with his
> registry on our server but is no longer a customer and hasn't moved
> his domains. There aren't any hosts behind the domains.
> 
> Is there anything more I can do to block/prevent them from continually
> querying my system outside of just redirecting them to localhost or
> something?
> 
> It's not a terrible amount of traffic, but it's pretty substantial.
> 
> Unfortunately asking him nicely didn't work.

Serve the customer an invoice. They're his domains after all, and he's
using up your resources. You can identify him and show that your
resources are being used because he has not moved the delegations.

		Mukund