Prevent Unwanted Device (Hub, Wireless Router) Connect To Cisco Switchport
Hi and good day,
Is anyone can guide me in how to prevent unwanted device (such as Hub, wireless router) from connect to the cisco switchport. Recently, I've found some user plugin their wireless router to our LAN port in office and because of that, the IP Address leased for client by DHCP server is almost full. Most of them are using two to three device connect to this wireless router. As for the security also this thing might caused a threat to our network infra. Currently we are using cisco catalyst 3750 for access switch (floor) and core switch 6513 as a backbone. Is anyone can help me solving this problem? Thank you in advance.
What Reza described is probably the easiest way to restrict the devices that can connect to your 3750. A bit more stringent variation would be to use the sticky option (if supported). This option remembers the 1st MAC seen and won't allow another until you reset the port.
From a security perspective, you generally want a method to authenticate the device connecting to the port, but this is complex to set up.
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