Command Reference Guide

3Com Router 5000 Family and Router 6000 Family mandatory-chap ● 49
Command Reference
mandatory-chap
Purpose Use the mandatory-chap command to force LNS to perform CHAP authentication
again with the client.
Use the undo mandatory-chap command to disable CHAP re-authentication.
Syntax mandatory-chap
undo mandatory-chap
Parameters None
Default By default, CHAP re-authentication is not performed.
Example Perform mandatory CHAP authentication.
[3Com-l2tp1] mandatory-chap
View This command can be used in the following views:
■ L2TP Group view
Description After LAC performs agent authentication on clients, LNS can perform authentication
on them again for enhancing security. If the mandatory-chap command is used,
each VPN client whose tunnel connection is initialized by access server will undergo
authentication both on access server side and on LNS side. Some PPP clients may not
support the second authentication. In this case, local CHAP authentication will fail.
Related Command: mandatory-lcp