Restrict people from repatching client

[pinyinhuo]

 

Hello, i just got my client 20131223, and i would like to use nemo so i could disable multiple logins or multiple windows.

i am successful so far to patch my client, 

my concern is, is it possible that people cant able to patch my current client so that they cant able to enable multiple window?

 

btw? If i use nemo, will it able to block maya purple hack and nodelay hack? Thanks!

[Technoken]

You can use grf encryption using grf tool and md5 client hash to prevent your client exe from being modified.

about the maya purple hack you can switch this to no but it will screw the game animation.

https://github.com/rathena/rathena/blob/master/conf/battle/client.conf#L185

Packet obfuscation also block packet spamming so this will help you avoid rpe and wpe.

But still gameguard like Gepard Shield is the best option if you can spare some $. 

[crazyarashi]

Hi Good Day,
 Yes it is possible if they know the exact client you are using which is kinda hard.

You won't be able to block WPE/Maya Purple hacks by just diffing it using NEMO. It's either you will use packet obsfuscation or
you will get a gameguard to block all third party programs.
but packet obsfuscation has limitations in blocking third party program.
gameguard is the best solution since a gameguard can limit max clients you wont have to worry about players bypassing your no multiple log-ins and block all third party programs :)))

Edited April 18, 2017 by crazyarashi
Spelling and grammar fix

[Promise]

You can just hex your exe to change some reading files, like clientinfo.xml, ini file, etc.

So if they re-patch the client, they wont be able to log-in to the server, unless they make same modifications to the .exe file.

[pinyinhuo]

Hello Everyone

I appreciate your concern, i guess i have to secure my grf and learn about md5.

Have a good one everyone ^^

 

[Emistry]

On 2017-4-19 at 7:11 AM, pinyinhuo said:

is it possible that people cant able to patch my current client so that they cant able to enable multiple window?

yes.

conf/login_athena.conf#L155-L171