Lets Encrypt Validation Server
recommended: allowThe Let's Encrypt validation server is a bot that verifies domain ownership as part of the process for issuing free SSL/TLS certificates. This bot visits websites to complete domain validation challenges required before certificate issuance as part of their automated system.
What it does
Let's Encrypt validation server's cadence depends on who directed it to your site. Continuous monitoring may run daily or hourly, while a one-time assessment typically sweeps once and disappears.
How to identify it
User-agent contains any of:
Lets Encrypt Validation Server
robots.txt
Well-behaved crawlers honor robots.txt. To control Lets Encrypt Validation Server:
Allow full access
User-agent: Lets Encrypt Validation Server
Allow: /Block entirely
User-agent: Lets Encrypt Validation Server
Disallow: /
Grey-area scrapers ignore robots.txt. Botscope enforces your policy at the edge or origin regardless —
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See Lets Encrypt Validation Server on your own site
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