Hi - I have a device showing on my network - it shows and unknown in Client box and a mac address 1C-D6-C7-F4-21-E0.

Online mac address search does not find anything related to make / manufacture etc.  It keeps renwing a lease evey 24 hours and when it renews the internet connection drops out and the router reboots itself.

I have blacklisted the devise whilst trying to find out about it, all my devices are still working ok. Any help on this would be appreciated.

Thanks