Extensible authentication protocol (EAP)

Specifies whether the server uses EAP to authenticate remote access and demand-dial connections.

Microsoft encrypted authentication version 2 (MS-CHAP v2)

Specifies whether the server uses Microsoft Challenge Handshake Authentication Protocol (MS-CHAP) version 2 to authenticate remote access and demand-dial connections. MS-CHAP v2 provides mutual authentication and stronger encryption and is required for encrypted Point-to-Point (PPP) or Point-to-Point Tunneling Protocol (PPTP) connections.

Encrypted authentication (CHAP)

Specifies whether the server uses the Message Digest 5 (MD-5) Challenge Handshake Authentication Protocol (CHAP) to authenticate remote access and demand-dial connections.

Unencrypted password (PAP)

Specifies whether the server uses the Password Authentication Protocol (PAP) to authenticate remote access and demand-dial connections. During a PAP authentication, passwords are sent in plaintext, or unencrypted, form. You should use this authentication protocol only if you must support PAP remote access clients.

Allow remote systems to connect without authentication

Specifies whether the server allows unauthenticated connections. Unauthenticated connections do not require a user name or password.