[dns-operations] Testing of SVCB/HTTPS records

Alarig Le Lay alarig at swordarmor.fr
Wed Apr 10 11:47:17 UTC 2024

On Mon 08 Apr 2024 09:54:57 GMT, Stephane Bortzmeyer wrote:
> Does anyone know a tool (online or local) to test that published
> SVCB/HTTPS records are correct? At least checking requirments like all
> parameter keys in order, and ideally try to connect to check the
> parameters.

I don’t know any tool either, but curl plans to implement it:

>	the next few years - perhaps
>	Roadmap of things Daniel Stenberg wants to work on next. It is
>	intended to serve as a guideline for others for information,
>	feedback and possible participation.
>	"Complete" the HTTP/3 support
>	curl has experimental support for HTTP/3 since a good while
>	back. There are some functionality missing and once the final
>	specs are published we want to eventually remove the
>	"experimental" label from this functionality.
>	HTTPS DNS records
>	As a DNS version of alt-svc and also a pre-requisite for ECH
>	(see below).
>	See: https://datatracker.ietf.org/doc/html/draft-ietf-dnsop-svcb-https-02
>	ECH (Encrypted Client Hello - formerly known as ESNI)
>	See Daniel's post on Support of Encrypted SNI on the mailing
>	list.
>	Initial work exists in PR 4011

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