Tool Modify the Loginserver and Gameserver ports! [Interlude c6]

[lampros1996]

Works Sure of Intelude C6!

This script is used to modify the login and game server ports inside engine.dll without requiring any changes in l2.ini. The modification happens directly within the binary data of engine.dll, ensuring that the client connects to the new ports.

 

Python Script:

 

import os

#  New Ports
NEW_PORT_2106 = 8888  # Login Server 8888
NEW_PORT_7777 = 9999  # Game Server 9999

#  Μετατροπή σε HEX (Little Endian)
OLD_HEX_2106 = bytes.fromhex("3A 08")  # 2106
NEW_HEX_2106 = NEW_PORT_2106.to_bytes(2, "little")  

OLD_HEX_7777 = bytes.fromhex("61 1E")  # 7777
NEW_HEX_7777 = NEW_PORT_7777.to_bytes(2, "little")  

# DLL
with open("engine.dll", "rb") as f:
    dll_data = f.read()

# Replace
dll_data = dll_data.replace(OLD_HEX_2106, NEW_HEX_2106, 6)
dll_data = dll_data.replace(OLD_HEX_7777, NEW_HEX_7777, 8)

# Save New DLL
with open("engine.dll", "wb") as f:
    f.write(dll_data)

print(" New DDL save as 'engine_patched.dll'")
print(f"   - Login Server Port: {NEW_PORT_2106} (Your New Port)")
print(f"   - Game Server Port: {NEW_PORT_7777} (Your New Port)")
print(" Replace engine.dll with a new!")

What This Script Does

1. Defines New Ports

   • Login Server: Changes the default port 2106 to 8888.
   • Game Server: Changes the default port 7777 to 9999.
   • You can change these values to any ports you want! 

2. Converts Ports to HEX Format (Little Endian)

   • 2106 → 3A 08 (old) → Converted to 8888 (22 22 in HEX).
   • 7777 → 61 1E (old) → Converted to 9999 (0F 27 in HEX).

3. Reads engine.dll

   • Opens engine.dll in binary mode and loads its content.

4. Replaces Old Port Values with the New Ones

   • Finds hexadecimal values representing the old ports inside engine.dll and replaces them with the new ones.
   • Replaces 6 occurrences of 2106 and 8 occurrences of 7777.

5. Saves the Modified DLL

   • Writes the updated data back into engine.dll, effectively patching it.

6. Prints Confirmation Messages

   • Confirms that engine.dll has been patched successfully.
   • Displays the new port values.
      

No need to modify l2.ini since the changes are applied directly inside engine.dll.
Works automatically without requiring manual editing of the client files.
Ensures correct connection ports for the Lineage 2 client.
 

Run the script to patch engine.dll.

Replace the old engine.dll with the patched one in the Lineage 2 system folder.

Launch the client—it will now connect to the new ports (8888 for login and 9999 for game server).

Edited March 8 by lampros1996

[gaminor]

Hello.

Tried, but after that game crashes because of engine.dll. Can't even start the game.

[lampros1996]

On 6/3/2025 at 2:23 AM, gaminor said:

Hello.

Tried, but after that game crashes because of engine.dll. Can't even start the game.

This specific modification was tested on a clean L2 C6 client and works perfectly. On ‘modified’ engine.dll I don’t know if it will work — find a clean engine.dll that is Windows 10 ready for C6 and try again!