Secutiry History Entries

As of yesterday, my modem lights have been constantly going crazy (not the norm unless I'm doing something or downloading something), even doing this when the PC was shut down over night, so I checked my secutiry history and there is a whole list of the following entry: 

 

Rule rejected UDP (17) traffic with (fe80::5d86:ffe6:8039:e45%11 Port(58389) )

 

I have run scans with both Norton and MBAM and all is clear but I am wondering, just what does these entries mean? 

 

Thanks for any help.