Guide to figuring out Ragnarok Online server details (version 3)
- Version 2: Fixed some typos.
- Version 3: Added a hexadecimal-to-decimal calculator.
May 23, 2006:
This guide is outdated. There's a new, more accurate guide available at:
Kore needs the following information about the Ragnarok Online server before it
Sometimes you don't know this information, or the information changes.
This guide teaches you how to figure out that information.
- IP address
- Port number
- Server master version number
- Server version number (not the same as the master version number)
Note: This guide does not cover servers that use secure logins, such
(A packet sniffer is a program that finds out what data another program tries
to send to the Internet.)
- A packet sniffer: either
WPE Pro (for Windows 2000/XP)
or WPE 1.3 (for Win95/98/ME).
You can also use any other packet sniffer you prefer, if you know what you're doing.
Note: some virus scanners think that WPE
is a trojan. That is not true, WPE is not a virus or trojan.
Ignore such warnings.
- A Ragnarok Online client.
Step 1: Select target program
Start your Ragnarok Online client. Do not do anything yet.
Start WPE/WPE Pro. First you must tell it what program's data you want to sniff.
Click on the little arrow besides the "Target program" button, and select the program
name of your Ragnarok Online client. This is usually ragexe.exe, or sakexe.exe
(if you're playing with the Sakray client). If you play on a private server,
the program name may be different.
Step 2: Start sniffing
Click on the "Play" button to start sniffing packets.
Step 3: Login with your Ragnarok Online client
Go back to the Ragnarok Online client. Type in some random gibberish in your login
dialog, and press Enter. It doesn't matter what you put in the ID and Password
fields, as long as they're both more than 3 characters.
You only have to press Enter, nothing more. It doesn't matter whether the login
succeeded or failed.
Step 4: Stop sniffing
Go back to WPE. Click on the "Stop" button.
A subwindow will appear in WPE.
You can now close the Ragnarok Online window.
Step 5: Analyze
The Ragnarok Online client sent some data to the Ragnarok Online server.
This data contains all the information we need.
(In this example, I used the iRO client to login.
All example information here applies only to iRO Chaos/Loki.)
So the information that we have gather in this example is as follows:
The text under the Destination column is the
IP address and the port number of the Ragnarok
In this case, the IP is 126.96.36.199, and the
port number is 6900.
The column in the middle (starting from "64 00") shows the bytes
that the Ragnarok Online client tried to send to the server.
The third byte is the server version number. However,
it's in hexadecimal. You need to convert it to a decimal number,
by using a calculator that supports hexadecimal.
In this case, the server version number is 18 (hexadecimal 12
is decimal 18).
The last byte is the master version number. This number is also in
In this case, our master version number is 1.
In Kore's configuration file, we put this:
- IP: 188.8.131.52
- Port: 6900
- Master version number: 1
- Version number: 18
master_name_0 (Put your server name here)