This is not a DDoS attack.It is just Sony over-reacting from the results of the recent DDoS attacks.I have made a full detailed tutorial on how to fix this frustrating problem on reddit and on this site without changing your public IP address,which is the only permanent solution once and for all.I dont know if anyone of you here have a knowledge in networking but I am just going to generalize eveything in one simple statement-Sony is being a b*tch and they let their consumers pay for their shitty servers.Thats why they get DDoS attacks always because the "hackers" saw great vulnerabilities on their lame security.In short,Sony's servers are crap and unstable.And of course,dont forget PLDT for giving you a cheat HomeBro_Ultera router which doesnt even support port forwarding.If you are finding solutions,then don't expect there would be one because Sony will never fix this shit forever.This has been an issue since 2008 for the PS3.Trust me,you will rage.