[atlas] Proposal: Add support for STARTTLS measurements [STARTTLS]

Hi Robert,

i really appreciate the introduction of STARTTLS measurements!
But if you do so, i strongly recommend to also introduce four new System Tags:

IPv4 FCrDNS working
IPv4 FCrDNS not working
IPv6 FCrDNS working
IPv6 FCrDNS not working

A lot of mailservers will block or cancel inbound connections, if the sending server has no Forward-confirmed reverse DNS record. Some mailservers do this immediately, others do it at a later communication stage. So, when someone would create a new STARTTLS measurement, it would be a huge help to be able to only choose probes, which have FCrDNS. It shouldn't matter, if it's a simple or obfuscated DNS record.

Please also take into consideration, to make FCrDNS mandatory for (new) anchors.

BR,
Simon



On 14.12.22 15:04, Robert Kisteleki wrote:
> Dear RIPE Atlas users,
>
> We recently published a RIPE Labs article containing a few proposals: https://labs.ripe.net/author/kistel/five-proposals-for-a-better-ripe-atlas/. We'd like to encourage you to express your comments about this proposal (if you'd like to share them) here.
>
> Regards,
> Robert Kisteleki
> For the RIPE Atlas team
>
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