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  1. #16
    Plutonium Lounger
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    Re: UDP connection request

    What's confusing to me is that one of 'em seems to be from iPowerweb which is a web hosting service. Have you ever used them in the past? Seems to me there is someone here in The Lounge who uses them, but I can't remember. I don't know if it could be some kinda monkey business so you're probably right to block it.

  2. #17
    Platinum Lounger
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    Re: UDP connection request

    Al

    I've never used them or heard of them before. But I guess that domain (within that range) may not have been the one trying to contact me - it could have been another, unrelated to this hosting service, I suppose. ???

    Alan

  3. #18
    Uranium Lounger
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    Re: UDP connection request

    <hr>is there a legitimate reason for anything (not just some unknown computer) to try to talk to a browser using UDP<hr>
    The answer is: it depends. <img src=/S/laugh.gif border=0 alt=laugh width=15 height=15> UDP is simpler and faster than TCP. UDP is connectionless (and unreliable). It does not demand an acknowledgement - it merely sends out the message. It can be useful when TCP connections are too complex or require too much overhead, typically where speed matters more than reliability.

    My thought is that blocking all UDP packets is unnecessary, but you are also unlikely to see any ill effects from it. Since UDP does not establish a circuit in the way that TCP does, the sender of a UDP packet has no way of knowing whether or not the data packet ever made it to the target...and UDP doesn't care, because it's not complex enough.

    Zat help any?
    -Mark

  4. #19
    Platinum Lounger
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    Re: UDP connection request

    The answer is: Yes and No. <img src=/S/grin.gif border=0 alt=grin width=15 height=15> But it does help me decide that setting a rule to block all UDP packets specifically "aimed" at the browser, whatever that means (that port I'm guessing), is not a bad thing. As I said, my cable ISP appears to be using UDP to resolve my DNS address quite frequently and these comms are allowed by the firewall by default. It's only those to IE that it alerts to. So I guess the rule stays unless it seems to generate problems.

    Thanks Mark.

    Alan

    Edited - And just to confuse me further, I just received this from my ISP:

    "You can configure your firewall to drop UDP packets. We do not send a heart beat to you computer so it would not have any effect. As long as your modem is online and you are not using an application which utilises UDP, your connection should be workable."

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