nanog mailing list archives

Re: DNS Lookup - Filter "localhost"


From: Anders Löwinger <anders () abundo se>
Date: Mon, 17 Nov 2014 23:49:00 +0100

4. Do you block non-UDP DNS requests or rate-limit requests?

Yes

Why?  RFC5966 DNS Transport over TCP - Implementation Requirements

You make it very hard for DNSSEC

5. Anything else you block/filter on your DNS servers?

block fragmented packets

Why? You then block EDNS0, which DNSSEC uses. (UDP packets up to 4096 bytes,
then TCP)


/Anders


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