{ "ppp": { "authentication": {} } }

Attribute	Description
username	Username. Default: user{session-global}@rtbrick.com
password	Password. Default: test
timeout	Authentication request timeout in seconds. Default: 5
retry	Authentication request max retry. Default: 30
protocol	This value can be set to PAP or CHAP to reject the other protocol. Default: allow both PAP and CHAP