A list of acceptable authentication methods for socks-rules, in order of preference (seperated by whitespace). Supported values are username, none, rfc931 and pam. This list is used as the default for all coming rules until changed. Then the changed list is used as the default for the next rules.
If a method is not set in this list it will never be selected.
none: The method requires no form of authentication.
username: the method requires the client to provide a username and password. This must match the username and password given in the system passwordfile.
rfc931: The method requires the client host to provide a rfc931 ("ident") reply for the connecting client. The name given in the reply must be present in the password database.
pam: The method requires the available clientdata to match against the pam database.