We have a security problem I would like to resolve. Like most sites our wired network has live ports that periodically, non corporate PCs and laptops connect up to without our knowledge. In our network we do not filter for valid MAC addresses although Ive learned this is a poor approach to security as MAC can be changed in about 10 seconds.
I would like a solution that would validate corporate systems and let them through the Cisco layer 3 switching and block out all other devices which attempt connection. We do not currently have IDS or IPS and are not likely to in short term.
Is there a hardware or software or combination solution out there that works well for this ?