3Com Switch 8800 Family IPsec Module Configuration and Command reference Guide

351
Parameter
None
Description
Use the l2tp tunnel authentication command to enable L2TP tunnel
authentication.
Use the undo l2tp tunnel authentication command to disable L2TP tunnel
authentication.
By default, L2TP tunnel authentication is performed.
L2TP tunnel authentication is permitted by default. Normally, authentication needs
to be performed on both ends of the tunnel for security’s sake. In case of network
connectivity test or receiving connection sent by nameless peer end, tunnel
authentication is not required.
Example
# Set not to authenticate the peer end of the tunnel.
[SecBlade VPN-l2tp1] undo tunnel authentication
tunnel avp-hidden Syntax
tunnel avp-hidden
undo tunnel avp-hidden
View
L2TP group view
Parameter
None
Description
Use the tunnel avp-hidden command to configure Attribute Value Pair (AVP)
data to be transmitted in hidden format.
Use the undo tunnel avp-hidden command to restore the default transmission
way of AVP data.
By default, the tunnel transmits AVP data in plain text.
Some parameters of L2TP protocol are transmitted by AVP data. If high data
security is desired, this command can be used to configure AVP data to be
transmitted in hidden format.
Example
# Set AVP data to be transmitted in hidden format.
[SecBlade VPN-l2tp1] tunnel avp-hidden