OK, its all up and running and was much easier than I thought it would be.
So here's how to do it if you've got a Synology, hope it helps someone!
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The Media server is a package preinstalled on a Synology running DSMv4.
Open up 'Package Center' and run 'Media Server'
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The media service broadcasts over UDP using an anonymous account, which translated means you don't have to log in making it easily accessible to all the devices on your LAN and you won't be able to pick up the media streaming service outside of your home
network.
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Normally as its goes with the Synology you would next assign application rights through the 'Application Portal' this isn't needed with the Media Server app, I did read somewhere that the guest account had to be enabled, not the case I found with DSM v4.0-2198
though.
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If you keep tight a firewall then you'll need to add the firewall rules, they are already preconfigured just put tick boxes in 'DLNA/UPnP media server 50002,50001 TCP' and 'DLNA/UPnP media server 1900 UDP'
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You can configure the Media Server service through the Synology start button using the Media Server applet but I didn't need to do any extra configuration as it worked out of the box.
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The only other configuration I did was on my router, pretty much every home router has something to configure with uPnP, on my router I enabled it and set the transmission packet to every 5 mins.
And that was it, works really well and all my hard labour of hours spent ripping DVDs into MP4 has paid off... at least I think, the xbox gives a real barebones view and I do wonder if it would have been quicker just to be a disc on a drive when I wanted
to watch it ;-)