title: SSL libraries parent: FAQ --- # Why doesn't the --ssl option work? To get the SSL features, you need to have the SSL libraries available. Either [OpenSSL][openssl] or [GnuTLS][gnutls] is suitable. Check the `./configure` output to see if the SSL libraries have been detected. [openssl]: http://www.openssl.org/ "OpenSSL" [gnutls]: http://www.gnutls.org/ "GnuTLS"