Ok, now after a lot forums n things i read and lot of hours spend at tests,this is what i know:
Things like items n money in game are server side wich means that u can create, change value, modify all u want but this only modifies the item in ur pc and when u try to send the info to the server (by trading or trying to change the place, etc) u get disconected. Why?? Well this is the interesting part that i´v learn sniffing packets with WPE: packets are encrypetd and seems like is n XOR encrypted. This means that each packet that u recive or send are crypted by a SINGLE key so every single packet r different that the others;and worse (and this is a guess) each new packet is created following the previous packet structure and allways following that key. Then, even if u can change things on ur client (u pc) when u try to send the info u crash because the packet that u trying to send has a different structure from that which should have following the XOR key.
Soooo.....i guess that even if u get that key u have to know the next packet structure, wich means u have to build a code with a lot 00BF*&0034..... and so lol, and that has to be the exact reproduction of the server future packet that the server will create or u will dc again.
Well,to find the key there is a lot of posts that teach how to start sniffing and others posts how to Reversing packets too...just google.
Once u get the key idk how to do next so ill apreciate if som1 can guivme som tips^^.
As i said before im an amateur n all that i learn was by curiosity, so if u guys wanna do som correction be my guest coz the purpose of this post is share the bit that i think that i know, fix what is wrong n learn a lil more.Maybe some1 can say if i am in the right way or not
And as we can c there is no magic solution for dupe, so when ppl come here n ask "plz som1 guivme the dupe" 1st of all no1 who likes the game gonna guive even if he knows coz this gonna ruin the game fast n 2nd is not easy since u need to have lot knowledge about.(thing that i have noot either lol)






