[CoD2][Tutorial] How to make your cracked server show up in the master list

[NemanjA]

What version is your iptables? (iptables --version)

I have Iptables 1.4.7

[Mitch]

I have Iptables 1.4.7

Does 'iptables -m string -help' work? And what does it say? You are probably missing the string filter module for iptables.

When you do 'cat /proc/net/ip_tables_matches' it should contain atleast string.

If it isn't in the list try loading it with: modprobe ipt_string.

[botskiller16]

Hi, so, which file is, what show the masterserver, and no must waiting 20mins? I use 1.3 cracked linux server, port: 28139

[Mitch]

Hi, so, which file is, what show the masterserver, and no must waiting 20mins? I use 1.3 cracked linux server, port: 28139

Read the information here: http://killtube.org/showthread.php?1...ull=1#post8293

iptables -A INPUT -p udp -m string --algo bm --string "BANNED_CDKEY" --sport 20700 --dport 28139 -j DROP
iptables -A INPUT -p udp -m string --algo bm --string "INVALID_CDKEY" --sport 20700 --dport 28139 -j DROP

Edit: INVALID_CDKEY means that the cd key is in use.

[bigbro]

very nice tutorial.
is it possible to do the same for CoD4 servers?

[Mitch]

very nice tutorial.
is it possible to do the same for CoD4 servers?

Yes, you only need to fix the delay in binary. (i am assuming that cod4 also uses INVALID_CDKEY and BANNED_CDKEY when the server rejects a connection)

[bigbro]

iptables strings are not working for me. Only this is working:

iptables -A OUTPUT -p udp --dport 20700 -j DROP

[bigbro]

unfortunately if I did this

iptables -A OUTPUT -p udp --dport 20700 -j DROP

the servers become invisible in the master list. *SAD*

This strings are not working at all:

iptables -A INPUT -p udp -m string --algo bm --string "BANNED_CDKEY" --sport 20700 --dport 28961 -j DROP
iptables -A INPUT -p udp -m string --algo bm --string "INVALID_CDKEY" --sport 20700 --dport 28961 -j DROP

no matter ports, destination or source.
So I did a traffic dump, and I have this UDP stream from port 20700:

....getIpAuthorize 250977360 7.7.**.** "" 0 PB "???"....ipAuthorize 250977360 deny BANNED_CDKEY 0 ???.

*??? > replaced some unique ids I believe, related to CDkey and etc... guid or something.

Conversation is going both ways - in and out between server IP and 63.146.124.40 (cod2master.activision.com has address 63.146.124.40).
After all that, server sends to client

....error
EXE_ERR_BAD_CDKEY

and that's it.
Can you help?
Linux server, ubuntu 13.10, game servers 1.3 CoD2


---
update: If the string IpAuthorize is removed, connection is ok with invalid cdkey,
"Connecting player #4 has a zero GUID" and "Sending heartbeat to cod2master.activision.com". Server is missing in master list.

[Mitch]

Linux server, ubuntu 13.10, game servers 1.3 CoD2

I tested on my own Ubuntu 13.10 (desktop) and I can add the iptables rules there (sudo is required if you are not running it under root)

You need to change the port to the port you are running your server on:

iptables -A INPUT -p udp -m string --algo bm --string "BANNED_CDKEY" --sport 20700 --dport [your game port] -j DROP
iptables -A INPUT -p udp -m string --algo bm --string "INVALID_CDKEY" --sport 20700 --dport [your game port] -j DROP

(sport is master server's port and dport is your own)

Now you need a modified binary for your game that you can find here:
http://killtube.org/showthread.php?1...-(1-0-1-2-1-3)
(you need at least the nodelay)

[bigbro]

Hi Mitch,
happy new year and thank you for your answer.
I found a way to fix it. Unfortunately it is not working with ip tables at all.
Just find getIpAuthoruze in bin file using hex editor and rename it (first one) with something else, so it will not get IP authorization for clients who want to connect to the server. That's it.