track number of WiFi connections over a month

I am running a Cisco wireless network with a Cisco 2112 WLC and several 1131AP's around our building.
We have an open wireless network setup for guests to connect when they are in our facility and I am looking for a way to track the number of devices that connect to the open wireless network each month (without having to use a splash page).

Is there any way to have the DHCP (Windows DHCP server) write a log entry every time a DHCP lease is initiated or renewed?

If I must use a splash page, how can this be setup?

Any suggestions on how this can be accomplished would be greatly appreciated.
Thanks,
MBisch
MBischAsked:
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Craig BeckConnect With a Mentor Commented:
WCS can be installed on a Windows or Linux server.  It comes as a software installer package which runs a web GUI and database server.

It's officially end-of-life now.  The successor is Prime Infrastructure.  This is available as a hardware appliance or as a VMWare-based virtual-machine.
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Craig BeckCommented:
You can log DHCP events.  The Windows log itself will log certain events, but if you want to log leases you can configure DHCP to log to file.

If you have a WCS server to manage your WLAN you can already get reports from that.
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gheistCommented:
cisco can log all wifi associations via syslog.
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Craig BeckCommented:
I don't think it will for a WLC.

People often think that Syslog will capture association info, but only SNMP will do it.  To get syslog to get association events you need to set the logging level to debug.
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gheistCommented:
It heavily depends on which of software it runs...
You need to check if association gets logged.

And still what is connection to internet in your opinion. one may acquire dhcp adress and just portscan the gateway without connecting the net....
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Craig BeckCommented:
And still what is connection to internet in your opinion. one may acquire dhcp adress and just portscan the gateway without connecting the net....
Why is that relevant?  The OP said...
Is there any way to have the DHCP (Windows DHCP server) write a log entry every time a DHCP lease is initiated or renewed?
...so who cares if you connect to the internet or not?!

The version of software is irrelevant.  All association events are logged via SNMP traps.
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gheistCommented:
You may configure static ip and not get logged in dhcp log....
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Craig BeckCommented:
The Cisco WLC allows clients to ONLY connect if an IP address is provided via DHCP, so that's not an issue really.
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MBischAuthor Commented:
craigbeck,
I'm not familiar with and don't have a WCS server.
Is the WCS a software only product or do I need to buy Cisco equipment to get WCS up and running.
Do you know anything about the cost or where I could get WCS server?
Thanks,
MBisch
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