Firewall rule with port 447

I have been looking at the setup of my router with regards to OUTGOING ports. Trying to tidyup following a connection upgrade.

Port 447 is open for o/g use. I cannot rermember what program uses this port.
Everything on the PC works, browser, downloads, email, AV/AT updates, ftp, ntp, dns etc.

I think it may have been for a program that's been deleted, the log shows nothing has used it this last week.

Anyone got a firewall rule for this port that can help (it's not a microsoft update port or something is it?)

 

Port Number: 447
TCP / UDP: UDP
Delivery: No
Protocol / Name: ddm-dfm (Differential Destination Multicast - Distributed File Management)
Port Description: DDM-RFM
Virus / Trojan: No

Side note: UDP port 447 uses the Datagram Protocol, a communications protocol for the Internet network layer, transport layer, and session layer. This protocol when used over PORT 447 makes possible the transmission of a datagram message from one computer to an application running in another computer. Like TCP (Transmission Control Protocol), UDP is used with IP (the Internet Protocol) but unlike TCP on Port 447, UDP Port 447 is connectionless and does not guarantee reliable communication; it's up to the application that received the message on Port 447 to process any errors and verify correct delivery.

>>>>>>>>>>>>>>>>


ddm-dfm 447/tcp # ddm-distributed file management, ddm-rfm

ddm-dfm 447/udp # ddm-distributed file management, ddm-rfm


>>>>>>>>>>>>>>>>>


you can always install a software rule based firewall inorder to track down specifically what is attempting to use it


ddm
http://www3.ietf.org/proceedings/00jul/I-D/manet-ddm-00.txt
http://en.wikipedia.org/wiki/Ad_hoc_routing_protocol_list