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Hello. I`m in a LAN and I have problems with the administrator. I`m playing Counter-Strike, a game on the internet which uses the ports 27005-27015. This game makes some traffic ...
  1. 03-12-2008 #1
    chronos3k
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    udp packets

    Hello.

    I`m in a LAN and I have problems with the administrator. I`m playing Counter-Strike, a game on the internet which uses the ports 27005-27015. This game makes some traffic and the administrator thinks that I`m using those ports to download from torrents and this is not allowed in this LAN. My question is how can be differentiate the game packets from the torrent packets? I assume that can be a method to find the IP destination or something so I can prove that I play online and not download from torrents. Is there a linux command for something like that ?
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  2. 03-12-2008 #2
    anomie
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    Your administrator doesn't allow torrent activity (bandwidth hog) but allows gaming (another bandwidth hog)?

    He should be able to watch your packets at the router level. Or you can capture some tcpdump output and present it.
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  3. 03-12-2008 #3
    chronos3k
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    yep .. gaming is allowed. I think he looked only for my IP and port used for game and the traffic so he stoped my internet connection. Don`t you think he should be able to check for the IP destination (the game IP) ? I`m affraid that he doesn`t know or he do not care about that IP .. Can you please give me a command to show him (on the router level)?
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  4. 03-12-2008 #4
    anomie
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    If the router is a Linux box, he could add an iptables rule that is specifically looking for packets going to your game server. Then he can watch the packet counters and (if you've shown that is all you're doing) maybe he will consider making it a permanent rule.

    Alternatively, he can watch traffic to the game server using tcpdump, capturing only packets to that IP.

    I'm a little skeptical that he is going to let you direct him on running commands on his own router. To keep this simple, why not just ask him to allow traffic from your box to the game server?
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  5. 03-12-2008 #5
    chronos3k
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    thank you for the reply and the command. The IP will prove that is a game server and not an torrent. I will ask him to show me the packets.
    I cannot ask him to allow me traffic to one server because I probably change servers in time.

    Thanks again. I hope I will solve this problem.
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