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?
Revoke all Certificates?
Raspberry Pi compatibility
Wanna Try Letscrypt on my Server
Simple and Clear Directions
S/MIME certificates
Developer Certs
New validation IP addresses
Letsencrypt's validity duration affecting SE ranking?
User Certs on Let's Encrypt
PKCS #12 certificates to be used with MassCert
Certbot-auto fails with python backtrace
Idea for improving the FAQ
FAQ page not prepared for questions
Completing A Challenge when DNS is Globally Load Balanced (Multiple DNS Entries Per Domain)
Python egg_info failed with error code 1
Certbot/Letsencrypt authenticator IP addresses
Will Let's Encrypt honor reasonable bits in the CSR for Free/Open Source projects?
Will you allow overlapping certificate requests?
Update link in the FAQ please
Update link in the FAQ please
Web hosting production workflow
Response to Inaccurate Customer Support Email
Better help requests through topic templates
FAQ page not prepared for questions
FAQ on forum is a bit outdated
pinned globally #2
closed #3