E: Protocol Glossary - Lantronix SecureLinx SLC8 User Manual

E: Protocol Glossary

BOOTP (Bootstrap Protocol)
Similar to DHCP, but for smaller networks. Automatically assigns the IP address for a specific
duration of time.
CHAP (Challenge Handshake Authentication Protocol)
A secure protocol for connecting to a system; it is more secure than the PAP.
DHCP (Dynamic Host Configuration Protocol)
Internet protocol for automating the configuration of computers that use TCP/IP.
DNS (Domain Name Servers)
A system that allows a network name server to translate text host names into numeric IP
addresses.
Kerberos
A network authentication protocol that provides strong authentication for client/server applications
by using secret-key cryptography.
LDAP (Lightweight Directory Access Protocol)
A protocol for accessing directory information.
Modem State Parameters
Dial-in—The SLC waits for a peer to call the SLC to establish a text (command line) or PPP
connection.
 For text connections, the user will be prompted for a login and password, and will be
authenticated via the currently the currently enabled authentication methods (Local Users,
NIS, LDAP, etc). Once authenticated, a CLI session will be initiated, and the user will remain
connected to the SLC until they either logout of the CLI session, or (if Timeout Logins is
enabled) the CLI session is terminated if it has been idle.
 For PPP connections, the user will be authenticated via PAP or CHAP (configured with the
Authentication setting). For PAP, the Local User list will be used to authenticate the login
and password sent by the PPP peer. For CHAP, the CHAP Handshake Host/User Name
and Secret/User Password will be used to authenticate the login and password sent by the
PPP peer. Once authenticated, a PPP session will be established using either negotiated IP
addresses or specific IP addresses (determined by the Negotiate IP Address setting).
Dial-out—The SLC dials a remote peer to establish a PPP connection. The SLC dials the Dial-
out Number, and if the remote peer requests PAP or CHAP authentication, provides the Dial-out
Login and Dial-out Password as authentication tokens. Once authenticated, a PPP session will
be established using either negotiated IP addresses or specific IP addresses (determined by the
Negotiate IP Address setting).
Dial-back—The SLC waits for a peer to call the SLC, establishes a text (command line) or PPP
connection, authenticates the user, and if the SLC is able to determine a dial-back number to use,
hangs up and calls the dial-back number to establish either a text or PPP connection.
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