Date: Tue, 3 Nov 2020 17:41:04 +0000 From: Bartłomiej Palmowski <bart@...nt.com> To: musl@...ts.openwall.com Subject: EDNS0 support? Hi, we run alpine based docker images in AWS (inside our VPCs). Which means that we're using dns servers provided by the AWS. The problem arises when we want to resolve a dns record that yields a large response, for example: $ nslookup eu.data.logs.insight.rapid7.com Server: 10.11.12.13 Address: 10.11.12.13:53 Non-authoritative answer: *** Can't find eu.data.logs.insight.rapid7.com: No answer Non-authoritative answer: *** Can't find eu.data.logs.insight.rapid7.com: No answer According to what I managed to find out the reasons are as follows: * edns0 is not advertise by the resolver * there is no retry with TCP Please advise on how we could reconfigure our images so that we're able to resolve records with lots of RRs with a musl resolver. 1 - https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/DNSBehavior.html -- *The information contained in this message is intended for the addressee only and may contain classified information. If you are not the addressee, please delete this message and notify the sender; you should not copy or distribute this message or disclose its contents to anyone. Any views or opinions expressed in this message are those of the individual(s) and not necessarily of the organization. No reliance may be placed on this message without written confirmation from an authorised representative of its contents. No guarantee is implied that this message or any attachment is virus free or has not been intercepted and amended.*
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