Here's a weird one. 

Using smartbridges equipment, is there any way I can find out which one
of my users changed their IP address??

When I do an arp listing in my router, I noticed that the IP/MAC pairing
was incorrect.  So...I called up the client who should have that IP and
their computer was off.  When they turned it on and went to IE, my
router prompted me with "IP address 172.16.x.x changed MAC addresses".
And then the arp listing showed the correct MAC for that IP.

He then turned off his computer and a little while later...I was again
prompted with the "IP address 172.16.x.x changed MAC addresses".  I
wrote down the MAC address, but that really does me no good.

I was hoping that a traceroute would show me which wireless devices he
was hopping out of...but no dice.

I looked in the associated client listing in the aPPo, but it does not
show that IP whenever I am looking.

I tried using sniffer software...but I cant pick up any traffic on the
LAN side of my router, being that it is also a switch.  I need to find a
way to make my port (permiscious) or act like a hub...so I can sniff
traffic on the whole network.

I also thought about having the valid client use a different IP for
now...and then block that IP at the LAN interface.  Then...just sit back
and wait for that client to call me (with an outage).

Anyway...my question is....how can I find out who is using this IP??

Sully

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