We have a 'guest' internet network that is open for anyone who is a 3rd party and/or guest in our building. This is a seperate vlan and basically just pipes them out to the internet so they can access their company email etc. Currently, we have a old Linksys router running this show and it's getting tired looking. We have a spare 2801 router and I was wondering if it is possible to monitor connections, traffic or some sort of log of what's going on/whos connecting to what external IPs and ports.
I know we could leverage nbar, I guess netflow? On the linksys there is an inbound/outbound access log that quickly tells you local IP -> external IP & port so you can quickly check whos connecting to what..
Apart from possibly netflow and some 3rd party software to view the data, anything quick and dirty I can use direct on the router itself? (It will also be handing out DHCP and services this network alone, so there is no other 'infrastructure' involved , so to speak)