Creating a self-signed SSL certificate

This is outdated. Better use Let’s Encrypt!

• There are 2 possibilities:

1. to self-sign a server certificate or
2. make a CA (Certificate Authority) and sign a server certificate with it

• Without a CA:
  • $ openssl req -new -x509 -sha256 -newkey rsa:2048 -days 10000 -nodes -out server.crt -keyout server.key
  • Set the Common Name (CN) to the FQDN and enter "." for everything else.
• Creating a CA and sign a server certificate with it:
  • $ openssl req -new -x509 -sha256 -newkey rsa:2048 -days 10000 -nodes -out myCA.crt -keyout myCA.key
    • Set the Common Name (CN) to something like "ACME root certificate" and enter "." for everything else.
  • $ openssl req -new -sha256 -newkey rsa:2048 -nodes -out server.csr -keyout server.key
    • Set the Common Name (CN) to the FQDN and enter "." for everything else.
  • $ openssl x509 -req -sha256 -in server.csr -CA myCA.crt -CAkey myCA.key -CAcreateserial -out server.crt -days 10000
• Put files server.crt and server.key to /etc/httpd/ (on Slackware) and set their permissions to 400.