(adsbygoogle = window.adsbygoogle || []).push({}); How do i get online with ps3 ita 4.21 without getting banned.
or do i have to use another dex firmware

If you have v2.0 then you can, but if you are at the olde version than you will not be able to connect. Also, make sure you have single settings for wifi, and np in the environment.

Why single

Just how it is man, but I would get on REBUG they're the best for that and they're is an issue where you can get a brick when switching between DEX to CEX on PS3ita. I use 4.30.2 REX when I want to RTE on my PS3 and I have switched between CEX and DEX perfectly with no issues many time's and was able to RTE just fine when I had setup everything properly.

You don't HAVE to do it, It's just if you don't you normally can't connect to psn servers