Local IP history?

[redhat27]

Hi, sorry if this has been already answered, but I couldn't find it in the forum.

Is there a way to get the IP history of the LAN clients (when the router is the DHCP provider). I see a lot of traffic to local 192.168.1.15 in the syslog (from firewall), but that device with that IP is not online anymore. Is there a place I can look to see which MAC had that IP recently?

Note: I have NAT acceleration enabled (which means Traffic Monitor just showing the traffic by interface, not by IP)

 

[RMerlin]

Try checking the DHCP lease list under System Log, or check the router's ARP table in case it might not have been flushed yet, over SSH:

ip neigh show

However if something else inherited the same IP, it might no longer be available anywhere.

 

[redhat27]

@RMerlin Thanks!