How to protect Switch ports?

Question added by Essam Abdullah Mohamed Elmaghrabi , System Engineer , Egypt Gold
Date Posted: 2015/05/20

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by Mustapha RACHAD , Stagiaire en tant que technicien spécialisé , Ministère de transport, d'équipement et de la logistique

To protect ports of a Cisco switch you need to set the following:

The ports must be on Access mode, note that after the # is a comment to light things up a little ^_^

S(config)#intf0/x # Where "x" is the port number

you can also do it on a range

S(config)#int range f0/x - y # Where "x" is the first port and "y" is the last port

S(config)#switchport port-security

S(config)#switchport port-security maximum x # Where "x" the number of allowed addresses between1 -132

You can use one of those:

S(config)#switchport port-security mac-address sticky # If you want to set the MAC-address dynamically
S(config)#switchpor tport-security mac-address XXXX.XXXX.XXXX # If you want to set the MAC-address manually

Then use one of these three

S(config)#switchport port-security violation shutdown # This will shutdown the port if there is a violation
S(config)#switchport port-security violation protect # This will disable the port if there is a violation
S(config)#switchport port-security violation restrict # This will restrict the port from been used if there is a violation