on our test c3 server we currently have l2walker working, 10.2.3 suck cause it doesnt detect the speed or atk speed, so its way to choppy to use, but i did get another version working
so currently l2walker does work on our test server, which is currently closed beta.
but our c2 server is located at

.
C3 server should be released on sept 20.
this is subject to change, and the reason why l2walker is disabled on the c3 servers, is usally cause they have a launcher that prevents multi client login from sam emachine, and also prevents the use of the l2.exe file.
You can thank the help exploit and overbuff for the security changes.