If messages appear as "PSN Error 80710A06" or "PSN Error 80710092" in these days when you try to access your PlayStation Network PS3, do not panic: the problem is not yours but from Sony. Since last Thursday April 21, PSN PlayStation 3 not working due to an external attack, allegedly orchestrated by a group of hackers.
Specifically, you should see something like this:
* Error 80710A06 - There was an error. It has closed its session PlayStation Network. (80710A06) among others
* Message: PlayStation Network is conducting maintenance.
Unfortunately, we can only advise you to be patient, you visit regularly the official PlayStation Blog for the latest details or to take a look at our news section. We also take this information note to encourage those who have doubts to write in the comments below.