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FAQ on forum is a bit outdated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