Google, Level 3 and the like's open DNS resolvers are strictly
rate-limited. They can't be used as DDOS amplifiers.
On the other hand, there are tons of open resolvers on the internet
without any sort of limiting. These are very effective amplifiers.
Regards,
Filip
On 29.8.2016 19:04, Laszlo Hanyecz wrote:
I know this is against the popular religion here but how is this abuse
on the part of your customer? Google, Level3 and many others also run
open resolvers, because they're useful services. This is why we can't
have nice things.
On 2016-08-29 15:55, Jason Lee wrote:
NANOG Community,
I was curious how various players in this industry handle abuse
complaints.
I'm drafting a policy for the service provider I'm working for about
handing of complaints registered against customer IP space. In this
example
I have a customer who is running an open resolver and have received a few
complaints now regarding it being used as part of a DDoS attack.
My initial response was to inform the customer and ask them to fix it.
Now
that its still ongoing over a month later, I'd like to take action to
remediate the issue myself with ACLs but our customer facing team is
pushing back and without an idea of what the industry best practice is,
management isn't sure which way to go.
I'm hoping to get an idea of how others handle these cases so I can
develop
our formal policy on this and have management sign off and be able to
take
quicker action in the future.
Thanks,
Jason
