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 – 80710101 and 80710102 – TechWonda
PlayStation 3 Error Code Troubleshooting Guide
How to fix(80710102)PS3/PSN dns error code internet connection failed - YouTube