These pages describe use of authentication with Barefoot.
There is limited room for authentication in a port bouncer such as Barefoot. The options that are available and can be configured via the clientmethod/method keywords are as follows:
No authentication (default)
#no authentication methods clientmethod: none
The default is to have no authentication, which can be specified explicitly as above with the none value. Having no authentication will likely be the proper configuration in most usage scenarios.
Described in the RFC 931 authentication page.
Described in the PAM authentication page.