User`s guide

SFVRA Connection Manager 65
C ONFIGURING U SERS
Access
L
AYER 2 PROTOCOL
The data-link protocol for a user. Select Combinet Proprietary Protocol (CPP) for Combinet users,
or select Point to Point Protocol (PPP) for all other users.
A
UTHENTICATION METHOD
For device level authentication methods, the choices are PAP, CHAP, CLID, CPP, NT, or none. If
PAP or CHAP is chosen, then a password must be specified. If CPP is chosen, then an Ethernet
address should be provided.
PAP P
ASSWORD SECURITY
PAP Security provides a method for the User to identify itself to the system using a 2-way
handshake. If PAP Password Security is enabled, and a PAP Password has been configured for the
User, the following holds true:
• After the initial connection is made, the remote device repeatedly sends the User Name and
Password to the system. The system will look up the received User Name in the User List.
• If the User Name is not found, the call is disconnected.
• If the User Name is found the system will validate the password.
• If the password does not match, the call will be disconnected.
• If PAP Password Security is enabled, and a PAP Password has not been configured for the Us-
er, Password validation is not performed.
CHAP C
HALLENGE SECURITY
An authentication phase between the remote device and the system begins with sending a CHAP
challenge request to the remote device. The CHAP request contains a string of bytes known as the
challenge value, which is changed on each challenge. Using the hash algorithm associated with
CHAP, the remote user transforms the challenge value plus its secret into a response value. The