Port Probe TCP Port : 135

DCE endpoint resolution

If you see port scan on 135, someone on your subnet mask must have got virus on their computer.

The Blaster virus worm packed with the run time compression program UPX tries to develop a connection over port 135.  See "Removal of Blaster Worm ( MSBlast + Nachi ) virus" for more information.

135,137/UDP, 135(incoming only),139/TCP, 445 MS-DC – NetBIOS - NetBIOS (also known as Server Message Block, LanManager, and Common Internet File System) is a networked file sharing protocol. The Microsoft Windows “Network Neighborhood” runs over NetBIOS. We filter this port to protect customers from inadvertently exposing files on their computers, and also to block worms which spread via open file shares. The latest addition to this series, a consolidated service port (TCP445), has also opened new (yet similar) security risks in Win2K and WinXP.

Port Number Decimal = 135/TCP