The available ciphers to use to negotiate SSL connections. You can use this parameter to set an explicit list of ciphers to allow, or to disallow specific ciphers.

The parameter uses the OpenSSL cipher string format. For details of this format, see the OpenSSL documentation (, or the apache mod_ssl documentation (

There is no default value for this parameter, which means that Controller uses the default cipher list. If you set the parameter, but do not specify any valid ciphers, Controller does not start.

Type: String
Default: None
Required: No
Configuration Section: SSLOptionN
Example: SSLCipherSuite=DEFAULT:!RC4
See Also: SSLConfig