DNSSEC and ISPs faking DNS responses

Sat Nov 14 22:17:26 UTC 2015

On Sat, Nov 14, 2015 at 05:32:41PM +1100, Mark Andrews wrote:
> In message <20151114044614.GA4973 at hezmatt.org>, Matt Palmer writes:
> > On Fri, Nov 13, 2015 at 10:51:52AM +0100, Bjørn Mork wrote:
> > > So what do we do? We currently point the blocked domains to addresses of
> > > a web server with a short explanation.  But what if the domains were
> > > signed?  We could let validating servers return SERVFAIL.  But I'd
> > > really prefer avoiding that for the simple reason that there is no way
> > > to distinguish that SERVFAIL from one caused by e.g. a domain owner
> > > configuration error.
> > 
> > Perhaps we need to expand RCODE to be the full octet, and indicate "blocked
> > for legal reasons" with RCODE value 25.
> 
> Rcode's were expanded to 12 bits back in 1999.  See RFC 2671.

I didn't feel it was worth looking beyond RFC1035 for an off-the-cuff joke.

- Matt