Having a BITCH of a time connecting PS3 to internet in a hotel. First I was getting IP errors. Fixed those, then got DNS error 80710102. I manually put these numbers in
How to fix PS3 DNS error (80710102) IT DOES WORK - YouTube
Fixing Your PS3 Network Connection [Solved]
How To Fix PS3 DNS Error – 80710101 and 80710102 – TechWonda