Technicolor TG582n - Port 51005 just opened - how to close it?

[#1]

Hi,

For some reason Port 51005 was opened on my router and I would like to close it again. I haven't been able to see a list of open ports from the admin interface, and I would be grateful if someone could let me know where to find the ports and how to close it again.

Many thanks in anticipation!

[#2]

Follow up question please - what is the current recommended firmware for the TG582n router? Thanks Iain