DNS server trick: Set Primary DNS to 67.202.81.137 under Network Settings
Simple SSL proxy that basically modifies the headers for outgoing packets to auth.np.ac.playstation.net’s to change “PS3 03.55″ to “PS3 03.56″ — this makes PSN believe the PS3 is using the proper firmware version
Got it? Now here is how we accomplish tactic #2:
1.Replacing a SSL cert in the CFW (in /dev_flash/data/cert) with your own CA SSL certificate
2. Creating an SSL certificate for “auth.np.ac.playstation.net” signed with your CA certificate
3. Run a DNS server on your machine that resolves auth.np.ac.playstation.net to your PC’s internal IP
4. Create a Java SSL proxy (basically PS3 <-> PC <-> PSN). The PC claims (to the PS3) that it is “auth.np.ac.playstation.net” and is successfully accepted because a CA signed the SSL certificate
5. Replace the headers sent PS3 -> PSN to specify “PS3 03.56″
Video: http://www.youtube.com/watch?v…s&feature=player_embedded
Srry das ichs net auf Deutsch übersetzt habe, muss gleich weg 
Quelle: http://www.ps3hax.net/2011/02/…-dns-block/#axzz1Djf6Qenw
