3com 5500-ei pwr Reference Guide

 

1-9 

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To enable the proxy detecting function, you need to enable the online user handshaking function 

first. 

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With the support of H3C proprietary clients, handshaking packets can be used to test whether or 

not a user is online. 

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As clients that are not of H3C do not support the online user handshaking function, switches cannot 

receive handshaking acknowledgement packets from them in handshaking periods. To prevent 

users being falsely considered offline, you need to disable the online user handshaking function in 

this case. 

 

# Enable the online user handshaking function. 

<Sysname> system-view 

System View: return to User View with Ctrl+Z. 

[Sysname] dot1x handshake enable 

Ethernet port view 

Use the dot1x handshake secure command to enable the handshaking packet protection function, 

protecting the device against attacks from fake clients. 

Use the undo dot1x handshake secure command to disable the handshaking packet protection 

function.  

By default, the handshaking packet protection function is disabled.  

 

The handshaking packet protection function requires the cooperation of the client and the 

authentication server. If either of the two ends does not support the function, you need to disable it on 

the other one.