PS3 DNS Error 80710102 FIX
Occasionally my PS3 refuses to sign in.? After trawling through a billion pages I finally found the solution.
Change your DNS servers to 22.214.171.124 or/and 126.96.36.199
All the other settings don’t really make any difference.? My router was even set up to put the PS3 in DMZ (Demilitarised Zone) which didn’t help at all. ? The fault really lies with your ISP, apparently.? My original DNS was 188.8.131.52 and 184.108.40.206.
Thanks to amstel78 from the PSN forums.