How to bypass 3.56 Update and Play online with 3.55- PS3

This is just a very simple, six-step tutorial on how to be able to sign into PSN on a 3.55 PS3, thus meaning you have bypassed the 3.56 Update.

Just follow these steps:

1. Go to "Network Settings"
2. "Internet Connection Settings"
3. "Custom"
4. Do everything like you normally would, then
5. "DNS settings"
6. "Manual"

and then put for both Primary and Secondary

7. Save Settings
8. Enjoy being online on 3.55 again

Here is video which also help you: