My PS3 has had a set internal IP since I got it – 192.168.0.30 It’s in the DMZ. After playing online yesterday I went back to play in the evening. The PS3 could not connect at all. It’s settings looked okay. Eventually checked the router and the PS3 entry had disappeared. It should have been in the LAN IP table and also the wireless access table but it had gone. The DMZ still showed the 192.168.0.30 All odd. Then no machines that were wired could connect. I use Powerline connections for most things and they all failed – except the laptop when I wired that to the router. Everything on wifi was fine. Lots of plugging in and out later I got it all working and I thought it was a dodgy Powerline plug. And it isn’t. So I have no idea why the PS3 was knocked out and why my wired connection was screwed. Odd. But at least it works now.