OSI Security Concern - Page 2
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Thread: OSI Security Concern

  1. #11
    Hmm. Looking back at my last posts I do see that I got a little excited. It has been a long time since I went over my electronics library. Thank you petemcevoy for making me prove myself, it was kinda fun.
    Tsk Tsk that \'vB Code is ON\' is really tempting me.. No bad prof.! BAD!
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  2. #12
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    You are so lame.
    Didn't you see what happened to KaKasomebody!
    You said you could circumnavigate a fibre optic networks's security in 20 mins, from this statement i can extrapolate 2 things - 1: you heard/read somewhere that fibre optic networks were more secure than other networks, and 2:you haven't got the first clue about network security.
    Allow me to explain why.
    The true reason fibre optic networking is secure has nothing to do with it being more resistant to intruders having local access to the network, its more to do with it being unsniffable - what the hell would you do with a soldering iron and "some parts"?
    And also you didn't know how to set a network card to use dhcp in linux - it just doesn't add up.
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  3. #13
    I am new to linux. And if you havent noticed I am into electronics. Fiber is a much more secure medium. And have you ever heard of FiberLANs it is an IEEE standard. This means that fiber NICs are used and fiber optic cable instead of coax or tp. How can what the medium be made out of determine how sniffable a network is. What makes fiber usually unsiffable is MULTIPLEXING spell it with me now M-U-L-T-I-P-L-E-X-I-N-G. All that you need to undo that nasty max-bandwidth using scheme that is also good for security is what is known as a multiplexer. Then the last thing you need is a way to get at the signal. With any other medium it is simple. But with fiber it is nearly unprecedented that a civilian can tap it, and yet it is fairly simple. Light is more ceseptible to dampeningg than electric signals across wire so you can easily be caught or the line can go down unless you amlify it.


    So tell me again why I am lame and fiber is unsiffable. I was talking about Layer 1 security THE ORIGINAL TOPIC, in conjunction with long range connections like T1 lines.

    You see that fiber security does not go past the physical layer so I dont know how you could thinlk that it is 'unsiffable' when the medium has nothing to do with that type of behavior since sniffing is higer up in the layers.
    Tsk Tsk that \'vB Code is ON\' is really tempting me.. No bad prof.! BAD!
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  4. #14
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    Lol, your a quick learner - beaverishly reading away at every website you could find on fibre optic networking.
    I do know a bit about fibre optic lans, i helped fit one for a large govermental corporation when i was contracting.
    If you'd like to meet in irc antionline for a little realtime chat (without the aid of search engines) i'd be only too happy to discuss the topic further.
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  5. #15
    This is really quite enjoyable. Sure I'll go on irc some time, I don't have it now though. I have not been beaverishly reading away at every website I could find on fibre optic networking. I'm working on my CCNA and CNE right now. I'm actually ashamed that I could not remember the number for the IEEE standard, since I was studying that last week.

    If you want to check out those part numbers or paladin-press for that matter go ahead. It is all quite real. That author did produce a book, that is what the IRC forum was about. Before you even ask this was way back in '97 when I was barely getting into network security so dont bother me about not having irc anymore.

    By the way


    govermental corporation
    Now isn't that contradictory considering corporations are out for profit and governments provide services to the people who so diligently pay taxes without any want of profit.
    Tsk Tsk that \'vB Code is ON\' is really tempting me.. No bad prof.! BAD!
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  6. #16
    nevermind they have a nice little java system for irc im on now.
    Tsk Tsk that \'vB Code is ON\' is really tempting me.. No bad prof.! BAD!
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  7. #17
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    Originally posted by prof3ssor
    This circuit will, theoretically, have serious problems when frequency, amplitude and...arggh..i cant remember the third type of modulation..ahh anyway when all three types of modulation are used it experiences problems
    Phase...Amplitude, Frequency and Phase... And don't forget Echo Cancellation...

    I agree that sniffing has nothing to do with it, being a higher Layer process. But can't 'sniffing' also refer to the physical sniffing of a communication line? Electrical power through a conductor generates an electromagnetic field, which isn't that hard to 'sniff', I guess. We WERE talking about Layer 1, remember? I don't see how you physically can sniff a Fiber line, though... Doesn't that implement cutting the wire?
    Originally posted by Petemcevoy
    The true reason fibre optic networking is secure has nothing to do with it being more resistant to intruders having local access to the network
    Damn, there goes my theory...
    govermental corporation
    A paradox indeed...But let me remind you, prof3ssor, that a paradox seems incorrect, but it actually IS TRUE... If it weren't true, it wouldn't be a paradox... So there's nothing wrong with 'governmental corporation'...
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  8. #18
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    Negative:
    Phase...Amplitude, Frequency and Phase... And don't forget Echo Cancellation...

    I agree that sniffing has nothing to do with it, being a higher Layer process. But can't 'sniffing' also refer to the physical sniffing of a communication line? Electrical power through a conductor generates an electromagnetic field, which isn't that hard to 'sniff', I guess. We WERE talking about Layer 1, remember? I don't see how you physically can sniff a Fiber line, though... Doesn't that implement cutting the wire?
    The easiest way is to simply use a fiber optic splitter, I'm not going to get into the argument between the two of them, but I will say that when we ran the fiber between our two offices underground, we had to use one on the other end to sniff traffic because of communication problems after it was installed. We didn't know if it was the equipment or the fiber. We later found out it was the equipment (thank goodness, ever seen that gross crap you have to put on the line to make sure it goes through the underground pipes smoothly ) Can you sniff a fiber? Yes. What layer is that suppose to be? I'm staying out of that one
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  9. #19
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    It seems that nobody is going to take me at my word on this, here's a link giving some details

    http://www.boran.com/security/it10-l...html#Heading18

    I could find more but its not my style to run around doing searches to seem knowledgable.
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  10. #20
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    from http://www.boran.com/security/it10-l...html#Heading18
    ==========================
    If confidentialiyt is a major concern, use fibre optics, they are very dificult to interrupt or sniff.
    ==========================
    Because FDDI is a fibre optic ring, it is impossible to "listen" by detection of magnetic fields and if someone tries to connect to the ring, they need specialist equipment and the ring would be disturbed - it should not go unnoticed.
    ==========================
    Remember that nothing is impossible, which is what I thought you two were talking about, I must be wrong. Now provided someone who wants to sniff your network is going to spend that kind of money on that kind of equipment, I think the only people that could would be a government of some nation. So provided the large cost of equipment to purchase or produce to do this, would outweigh what gains you could achieve. This is of course to go unnoticed. If you knew what was going on with your network, then the cheap stuff (actually still expensive) works just as well. I think it's safe to say that *one* person wouldn't go through all this trouble to tap a fiber when he/she could find other ways into a network.
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