Please enable the following online ports on your connection:
TCP: 80, 443, 9988, 10000-10100, 17502, 42127
UDP: 3659, 14000-14016
For specific instructions on how to open your ports, please visit http://www.portforward.com/ or contact your router manufacturer. If that doesn’t work, you can try to use the Google DNS service.
Some people reported that changing their DNS to the Google DNS (Primary: 8.8.8.8, Alternative: 8.8.4.4) solved the issue. These can slower your connection as well.
It could be related to your Media Server Connection.
The Media Server Connection allows other devices to connect to your PLAYSTATION 3. Often, the Media Server Connection is known to cause issues when players try to connect to the Internet for online game play.
- Access your Xross Media Bar menu
- Navigate to Settings
- Select Network Settings
- Select Media Server Connection and choose the Disable option.
Turn off the Media Service connection can slower your PS3 internet connection (especially for downloading).
Cheers
Basti
