broadcast packet

Hello everybody,
I have aWindowsServer2008 R2Enterprise-Enterprisewith TMG 2010,
On the monitoralerts,accused ablockingconnectionsper minutefrom a
Determinedmicro, I analyzed thelogsand sawthat there aremany blocksofbroadcast
Thismicrocomingport 5355.
TheTMGby defaultblocks thebroadcast, howeverwhat makes mepuzzledis the amount ofblockingcoming this specificmicro.
I analyzedthe logsofantivirusand nothing wasdetected,themachine isinstalledSymantecendopoint.

I would liketheopinion of colleagues, I am postingthefollowingproblem:

Cliente IP            Destination ip    Destination Port

192.168.0.130      224.0.0.252                 5355           Link-local multicast name resolution      Denied

192.168.0.130      224.0.0.252                 5355           Link-local multicast name resolution      Denied

192.168.0.130      224.0.0.252                 5355           Link-local multicast name resolution      Denied

FWX_E_BROADCAST_PACKET_DROPPED