Thanks for the info erasmot, I will install Wireshark too, I guess the more the merrier really!!
With regards to RDP'ing, thankfully, I use Kubuntu 11.04 mainly from my laptop, we do have XP and Vista clients (Wife and kids don't do Linux..........until they want DVD's ripping, a machine that can get on the internet in the same month it was powered up etc etc), but there's only me who connect's to the server for maintenance reasons, and I use Kubuntu, or occasionally my Android phone (but not often, viewing the whole desktop is a challenge on a 4" screen!!) to connect to the server, but never the Windows clients! RDP Password being a mixture of upper case, lower case and numbers.
I have read a few posts on making the HTTP access a secure HTTPS connection, I've been giving some thoughts to making that happen, expecially if I end up re-building the server to stop this from occuring (however I'd rather fix than re-build as I have 4 x 2TB disks on a RAID 5, and don't fancy nursing the data accross to a new build), but, in saying that, it seems a little daft having a internet side server, with no internet because your ISP has cut you off!! I suspect, or at least hope it will take more than one letter before they get nasty and threaten me with scissors on my connection!
I have heard nothing else from them, so, either no-one else has complained, I've turned off or blocked the method they were using to get in by removing the ports on the Firewall, or it was a glitch in the Matrix, and the problem has gone away with an update.
I know you can set up RDP over SSH, again, I have seen posts about it on the Ubuntu forums I believe, quite a lot of effort for what is now an internal only connection! If they've hacked my Wi-Fi & network, I've got bigger problems than a server going a bit haywire at 3am in a morning!!