Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide
Chapter 1 L2TP Configuration Commands
3Com Corporation
1-9
1.1.11 mandatory-chap
Syntax
mandatory-chap
undo mandatory-chap
View
L2TP group view
Parameter
None
Description
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.
By default, CHAP re-authentication is not performed.
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.
Example
# Perform mandatory CHAP authentication.
[Quidway-l2tp1] mandatory-chap
1.1.12 mandatory-lcp
Syntax
mandatory-lcp
undo mandatory-lcp
View
L2TP group view
Parameter
None