PSN problems caused by

[j0yc3man]

no firewall and outdated security
http://www.computerandvideogames.com/300332/news/sony-was-using-outdated-security-and-no-firewall-for-psn-says-security-expert/

[DEADDOLL666]

You would'nt think a big company like sony would be so stupid to have done that :/

[j0yc3man]

pretty bad,mine only gets used by my kids now but i would be well annoyed if i only had the ps3 and couldnt use it for this reason
terrible service by SONY

[cossac]

According to the graphics and information Sony put out, there was a firewall in place.

[MVG zapiy]

Shocking, is all I can say on the matter.