Authentication protocol for remote access peer SSTP VPN
pap chap mschap mschap-v2
pap
Authentication via PAP (Password Authentication Protocol)
chap
Authentication via CHAP (Challenge Handshake Authentication Protocol)
mschap
Authentication via MS-CHAP (Microsoft Challenge Handshake Authentication Protocol)
mschap-v2
Authentication via MS-CHAPv2 (Microsoft Challenge Handshake Authentication Protocol, version 2)
(pap|chap|mschap|mschap-v2)
pap chap mschap mschap-v2