QoS question

Discussion in 'Tomato Firmware' started by basmic, May 28, 2007.

  1. basmic

    basmic LI Guru Member

    Firstly, sorry if I come across as silly for asking the questions that I am about to ask - but I'm not that clever with networking. :tongue:

    Basically I read enabling QoS uses some of your upload bandwidth. I don't mind doing this on my internal LAN, but I would prefer not to have QoS data broadcast out to the internet.

    From what I can gather, QoS transmits what applications are using my bandwidth, and I can tell my router to use that data to throttle data from a certain program. So I don't my router using this data, to throttle outgoing data to my cable modem - but I prefer not to 'leak' information, where possible.

    So what advantages would I get from re-installing the QoS protocol in Windows XP Pro? As a rule, I always remove it from networking when installing XP.

    Really, my ultimate goal is to limit upload traffic from a computer. So when I'm playing Unreal Tournament (not 2003/2004), I'm not lagged suddenly by that user uploading files on MSN, Internet Explorer, etc.

    Is the above possible without the use of QoS?

    Thanks - mostly for being patent :tongue:, but also for any future responses!
  2. basmic

    basmic LI Guru Member

  3. XfrostX

    XfrostX LI Guru Member

    just download net limiter
  4. larsrya8

    larsrya8 LI Guru Member

    I have no idea what the OP is talking about... sending data over the internet about what applications you are using? What form of QOS are you referring to? Tomato's implementation does not send out information in this way... it is all taken care of on the router. You don't need to install software on your computer.
  5. GeeTek

    GeeTek Guest

    Basmic, my friend, you have so many multiple and chronic technical mis-understandings that I'm afraid most folks (self included) are having trouble finding the energy to set you straight. :frown:
  6. basmic

    basmic LI Guru Member

    Basically I wanted to limit a specific computer's upload, by telling the router to throttle that computers upload traffic - but using the IP address to throttle, rather than QoS data. I don't think is possible.

    I am reluctant to turn on QoS, because I heard it transmits what programs are accessing the network, and types of programs.

    If the QoS data does not go further than my router, then I may well tinker. But I just need this confirming.

    Sorry for over complicating things. :p
  7. zhenya

    zhenya LI Guru Member

    No, qos 'data' doesn't pass outside of your router. In fact, unless you are saturating your up-link, qos has no effect at all (well, depending on the specifics of how you configure it). Qos merely decides what traffic receives priority, in case of a backlog, moving those prioritized packets to the head of the queue. These decisions are made by inspecting the inherent traits of the packet (service type, mac address, ip address, etc.) and does not alter packets in any way; it merely re-organizes them.

    What you don't seem to realize here is that all of your traffic that traverses a network, including the Internet, contains lots of information about what programs you are using, what websites you are visiting, often even the contents of your email, including usernames and passwords, right in plain text, that anyone with a packet sniffer and access to the network can see. You need to assume that ANY traffic that is not explicitly encrypted (for web traffic this is denoted by the 'https' header, and often a lock icon on your browser), is transmitted in the clear, and others could know what you are doing.

    I hope this clears things up for you a bit.
  8. GeeTek

    GeeTek Guest

    QOS is simply a traffic cop. It does not add to nor subtract from the data stream in any way. It is a computer program that inspects the packets and based on a variety of parameters such as address or protocol and delays lower priority packets over higher priority packets. The only modifications it makes to the data stream is holding on to and delaying any given packet in favor of a higher priority packet. That is it. There is no security risk by any streach of the imagination. You are not creating or transmitting any information whatsoever. What leaves the router is the same exact information that goes into it, but in a slightly different order. This is a valuable tool to tame and control aggressive traffic such as peer to peer and a variety of other things. It is very beneficial. You should turn it back on inside the computers as well. It serves a very useful purpose, and it is beyond assinign to be un-installing it from your computer. Whoever told you that extra data was generated or that it was in any way a security risk, has just climbed out from underneath a rock on the dark side of the moon.

    Edit - Here is some more stuff to read....... http://en.wikipedia.org/wiki/Quality_of_service
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