I’ve got a conundrum that has kind of come to a head for me. It may be 2019, 
but Comcast is still too incompetent to provide me with properly-working IPv6, 
so I’ve resorted to using a Hurricane Electric tunnel for IPv6 access. However, 
Netflix blocks all Hurricane Electric and similar tunnels under the assumption 
that you’re trying to scam their location identification and access content 
that you don’t have geographic access to and, worse, the Netflix apps prefer 
IPv6 over IPv4 when it’s available, so Hurricane Electric users are kinda 
screwed.

In the past, I’ve dealt with this by adding a black hole route for Netflix’s 
IPv6 prefix. However, I’m now having to block THREE /48 prefixes in order to 
keep Netflix working, and from what I can tell that means I’m now blocking most 
of AWS’s enter CDN, so I’m losing out on IPv6 on a bunch of sites.

This solution is really like using a sledgehammer to install a picture frame 
hanger (and having to replace the picture frame hanger every few months). A 
better solution is to prevent Netflix from doing AAAA lookups (or somehow 
filter them and respond with only A results). I’m already using PowerDNS 
Recursor for my DNS. Is there a way I can configure PowerDNS Recursor so that 
certain domains (like Netflix) respond with only A results and never return 
AAAA results, so that I can remove my blackhole routes?

Thanks,

Nick

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