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ICMP

Discussion in 'MCDST' started by derkit, Nov 21, 2007.

  1. derkit

    derkit Gigabyte Poster

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    urghhhh... what?

    Looking at Windows Firewall and it makes reference to ICMP Exceptions. Reading through the MS press book I get a vague jist of what its about but to be honest look at it rather blankly.... WTF?!?

    The best I've managed to gather together is that ICMP is a error message delivery thing... - am I barking up the right tree, or am I in the completely wrong forest??

    Help?!
    :oops:
     
    Certifications: MBCS, BSc(Hons), Cert(Maths), A+, Net+, MCDST, ITIL-F v3, MCSA
    WIP: 70-293
  2. Sparky
    Highly Decorated Member Award

    Sparky Zettabyte Poster Moderator

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    This link should help mate, its basically ping

    http://www.tech-faq.com/icmp.shtml
     
    Certifications: MSc MCSE MCSA:M MCSA:S MCITP:EA MCTS(x5) Security+ Network+ A+
    WIP: Exchange 2007\2010
  3. derkit

    derkit Gigabyte Poster

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    I understood that it is used for ping and tracert - and I think I was in the right forest for understanding what it does - that page did help. cheers!

    I just found trying to understand the ICMP Exceptions section a little confusing, maybe a nights' sleep on it will make it settle in my head a little more :)
     
    Certifications: MBCS, BSc(Hons), Cert(Maths), A+, Net+, MCDST, ITIL-F v3, MCSA
    WIP: 70-293
  4. BrotherBill

    BrotherBill Byte Poster

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  5. derkit

    derkit Gigabyte Poster

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    cheers Bill. I read that page before posting and most of it seemed slightly above my head.

    I suppose for this exam I don't really need to understand ICMP completely, just what it is and where it fits in - I felt the wiki page was above my level a little :)

    Will revisit it no doubt during the N+
     
    Certifications: MBCS, BSc(Hons), Cert(Maths), A+, Net+, MCDST, ITIL-F v3, MCSA
    WIP: 70-293
  6. BrotherBill

    BrotherBill Byte Poster

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  7. Bluerinse
    Honorary Member

    Bluerinse Exabyte Poster

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    I prefer to read the RFCs.. check this one written in 1981 :)


    http://www.ietf.org/rfc/rfc0792.txt
     
    Certifications: C&G Electronics - MCSA (W2K) MCSE (W2K)
  8. Sparky
    Highly Decorated Member Award

    Sparky Zettabyte Poster Moderator

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    Generally the source of the ICMP traffic is used for exceptions. For example if you tried to ping the WAN port of a firewall from the internet it should not give a reply. However if you were using a PC on the LAN and pinged another PC on the LAN then it should reply as the ICMP traffic is all LAN based.
     
    Certifications: MSc MCSE MCSA:M MCSA:S MCITP:EA MCTS(x5) Security+ Network+ A+
    WIP: Exchange 2007\2010
  9. derkit

    derkit Gigabyte Poster

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    And now I'm with it - see, a little bit of sleep really did help :D
    Thanks for the help guys.
     
    Certifications: MBCS, BSc(Hons), Cert(Maths), A+, Net+, MCDST, ITIL-F v3, MCSA
    WIP: 70-293

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