nanog mailing list archives
Re: Common operational misconceptions
From: sthaug () nethelp no
Date: Thu, 16 Feb 2012 13:01:43 +0100 (CET)
If you want to know if your resolver talks IPv6 to the world and supports 4096 EDNS UDP messages the following query will tell you. dig edns-v6-ok.isc.org txt Similarly for IPv4. dig edns-v4-ok.isc.org txt
Both PowerDNS recursor 3.3 and Nominum CNS 3.0.5 have problems with these queries. They both get the TC answer from 149.20.64.58 / 2001:4f8:0:2::8. Then: - CNS tries with 4000 EDNS UDP size (4000 is the CNS documented max UDP size), gets another TC. - PowerDNS doesn't try to used EDNS at all. Then they both try TCP and get a RST. And then they return SERVFAIL. Steinar Haug, Nethelp consulting, sthaug () nethelp no
Current thread:
- RE: Common operational misconceptions, (continued)
- RE: Common operational misconceptions Nathan Eisenberg (Feb 15)
- Re: Common operational misconceptions Steve Bertrand (Feb 15)
- Re: Common operational misconceptions Mark Andrews (Feb 15)
- Re: Common operational misconceptions Masataka Ohta (Feb 15)
- Re: Common operational misconceptions Charles Mills (Feb 15)
- Re: Common operational misconceptions John Kristoff (Feb 16)
- Re: Common operational misconceptions Tony Tauber (Feb 16)
- Re: Common operational misconceptions Mark Andrews (Feb 15)
- Re: Common operational misconceptions Masataka Ohta (Feb 15)
- RE: Common operational misconceptions Nathan Eisenberg (Feb 15)
- Re: Common operational misconceptions Steve Bertrand (Feb 15)
- Re: Common operational misconceptions sthaug (Feb 16)
- Re: Common operational misconceptions Mark Andrews (Feb 16)
- Re: Common operational misconceptions Jeroen Massar (Feb 16)
- Re: Common operational misconceptions Mark Andrews (Feb 16)
- Re: Common operational misconceptions Phil Regnauld (Feb 16)
- Re: Common operational misconceptions Mark Andrews (Feb 16)
- Re: Common operational misconceptions Phil Regnauld (Feb 16)
- Re: Common operational misconceptions Mark Andrews (Feb 16)
- Re: Common operational misconceptions Daniel Griggs (Feb 16)
- Re: Common operational misconceptions Mark Andrews (Feb 16)
- Re: Common operational misconceptions Owen DeLong (Feb 15)