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- LeoStrop
I found this page that says certain port forwarding settings might be needed to be modified in your router for better online gameplay: http://www.gran-turismo.com/us/gt6/manual/#!/onlinerace/portfowarding
Try this: https://www.gtplanet.net/forum/threads/playstation-dmz-connection-tutorial.272449/
It's basically using a static ip for your ps3, and then enable DMZ for that particular ip on your router page.
All ports should be open after that, but there is no firewall protection anymore for that ip.
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