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Correct that a LLMNR cache does not exist in Windows 7 / Server 2008 R2 ? RRS feed

  • Question

  • Hi all,

    according to Netmon 3.4 captures a "cache" for LLMNR does not exist in Windows 7 / Windws Server 2008 R2 or am I wrong?

    Thanks

    Edith

     

    edith

    Wednesday, July 6, 2011 9:07 PM

Answers

  • Hi,

     

    That’s right.

     

    LLMNR messages use a similar format as DNS messages that are defined in RFC 1035 and use a different port than DNS messages. LLMNR Name Query Request messages in Windows Vista are sent to UDP port 5355. LLMNR Name Query Response messages are sent from UDP port 5355. 

     

    The LLMNR cache will only be queried for information if a DNS query fails, and it should not be considered the primary form of name resolution but rather a complementary one.

     

    These articles may also helpful to you:

    http://technet.microsoft.com/en-us/library/bb878128.aspx

    http://www.ietf.org/rfc/rfc4795.txt

     

    Hope that helps.

     

    Regards, 

    Leo   Huang

    TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.com


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
    Thursday, July 7, 2011 6:05 AM
    Moderator

All replies

  • Hi,

     

    That’s right.

     

    LLMNR messages use a similar format as DNS messages that are defined in RFC 1035 and use a different port than DNS messages. LLMNR Name Query Request messages in Windows Vista are sent to UDP port 5355. LLMNR Name Query Response messages are sent from UDP port 5355. 

     

    The LLMNR cache will only be queried for information if a DNS query fails, and it should not be considered the primary form of name resolution but rather a complementary one.

     

    These articles may also helpful to you:

    http://technet.microsoft.com/en-us/library/bb878128.aspx

    http://www.ietf.org/rfc/rfc4795.txt

     

    Hope that helps.

     

    Regards, 

    Leo   Huang

    TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.com


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
    Thursday, July 7, 2011 6:05 AM
    Moderator
  • Hi,

     

    Did your issue solved? Please feel free to give me any update.

     

    Thanks.

     

    Regards, 

    Leo   Huang

    TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.com


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
    Monday, July 11, 2011 1:40 AM
    Moderator
  • Hi,

     

    As this thread has been quiet for a while, we assume that the issue has been resolved. At this time, we will mark it as ‘Answered’ as the previous steps should be helpful for many similar scenarios. If the issue still persists, please feel free to  reply this post directly so we will be notified to follow it up. You can also choose to unmark the answer as you wish.

     

    BTW,  we’d love to hear your feedback about the solution. By sharing your experience you can help other community members facing similar problems. Thanks for your understanding and efforts.

     

    Regards,

    Leo   Huang

    TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.com


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
    Wednesday, July 13, 2011 8:16 AM
    Moderator
  • Hi,

    sorry for the late reply! Yes it reassured me that there is no LLMNR .

    Thank you

    Edith

    Friday, July 15, 2011 12:59 PM