Frequently Asked Questions (FAQ)


Please see for Frequently Asked Questions about Let’s Encrypt.

Two unrelated domains on one server
How to get a certificate?
When to generate Certs again?
Raspberry Pi compatibility
Revoke all Certificates?
Welcome to Let's Encrypt Community Support
Wanna Try Letscrypt on my Server
Developer Certs
Letsencrypt's validity duration affecting SE ranking?
Simple and Clear Directions
Python egg_info failed with error code 1
Idea for improving the FAQ
Certbot/Letsencrypt authenticator IP addresses
User Certs on Let's Encrypt
Will Let's Encrypt honor reasonable bits in the CSR for Free/Open Source projects?
PKCS #12 certificates to be used with MassCert
Certbot-auto fails with python backtrace
Completing A Challenge when DNS is Globally Load Balanced (Multiple DNS Entries Per Domain)
Web hosting production workflow
New validation IP addresses
S/MIME certificates
FAQ on forum is a bit outdated
FAQ page not prepared for questions
Update link in the FAQ please
Update link in the FAQ please
FAQ page not prepared for questions
Will you allow overlapping certificate requests?
Better help requests through topic templates
Response to Inaccurate Customer Support Email