Re: DNS Amplification attack?

[jay () miscreant org]

Quoting Chris Adams <cmadams () hiwaay net>:

> Once upon a time, jay () miscreant org <jay () miscreant org> said:
> > I've also noticed that on a server running BIND 9.3.4-P1 with
> > recursion disabled, they're still appear to be getting the list of
> > root NS's from cache, which is a 272-byte response to a 61-byte
> > request, which by my definition is an amplification.
>
> Add "additional-from-cache no;" to the options{} section of your
> named.conf.
> --
> Chris Adams <cmadams () hiwaay net>
> Systems and Network Administrator - HiWAAY Internet Services
> I don't speak for anybody but myself - that's enough trouble.

Thanks for the response Chris.

I'm running higher versions of BIND, so don't see this behaviour. But  
I will pass it on to the ISP in question ;)