Cracked l4d2 Server
Posted 08 December 2009 - 07:06 PM
There is some weird stuff going on with l4d2 servers. They don't stop sending the "OK, you're accepted" packet. I guess it just takes very long. For example your server sends this normal OK packet every two seconds to Setti server now.
Posted 09 December 2009 - 11:28 PM
I created a little program in c# which listens my local UDP 27011 port. Then, in my local dedicated l4d2 server i adding string setmaster add 192.168.1.10:27011 into server.cfg file (since my network adapter has this address). Then i starting listener program and then starting that dedicated server. Listener program registers an first incoming message from that dedicated server - this is "4D 03" (M?) message. Why server sends this weird message if developer.valvesoftware.com says that it first must send "71" ('q' letter) to masterserver as a first 'Join' message due to gameserver<->masterserver protocol (Masterserver query protocol)? And when i sending documented challenge back to gameserver, gameserver doesnt sends nothing in reply.
Does it means that these bastards at Valve used another (not documented) protocol for Left 4 Dead 2 ?
Posted 10 December 2009 - 02:28 PM
It's probably slightly different on L4D2. Otherwise maybe you captured wrong traffic. Maybe the packet is the second or third packet or something.
If you want to investigate it further, then start network capturing the whole traffic and then create a normal l4d2 server without "setmaster 127.0.0.1". Then see what the game sends to valve masterservers and what the valve masterservers reply.
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