Your IP:

Support

K-12 Forums

Talk with other K-12 network administrators in your state.

Or see all states.

Categories

Vanilla 1.1.4 is a product of Lussumo. More Information: Documentation, Community Support.

This discussion has been inactive for longer than 30 days, and is thus closed.

Administrative: Why I have to connect whit hit-nxdomain.opendns.com at 137-138 UDP and 445 TCP port??

Bottom of Page

1 to 4 of 4

  1.  
    • CommentAuthorzotgene
    • CommentTimeApr 7th 2008
     permalink
    That is a ports for CIFS/SMB protocol.....
    hit-nxdomain.opendns.com want to share whit me same files???
    My network have a firewall that it's very closed,the bloking of opendns works but I can't see a blocking page...
    They are some detailed documents about opendns?

    sorry for my english
    Thankful People: ewcewc
    • CommentAuthorewcewc
    • CommentTimeApr 21st 2008 edited
     permalink
    I am wondering what that is too?

    in fact both these show up in my netbarrier logs and I don't know what they refer to or why:
    hit-adult.opendns.com
    hit-nxdomain.opendns.com

    because when I enter each one in the browser url address bar:
    You tried to visit hit-adult.opendns.com, which is not loading.
    http://guide.opendns.com/?url=hit-adult.opendns.com

    You tried to visit hit-nxdomain.opendns.com, which is not loading.
    http://guide.opendns.com/?url=hit-nxdomain.opendns.com


    What are those and what do they signify? why do they show up but they don't exist?
    • CommentAuthorrotblitz
    • CommentTimeApr 21st 2008
     permalink
    This is apparently how OpenDNS works. Any non-existing domain is linked to hit-nxdomain.opendns.com loading guide.opendns.com, in case spell-checking didn't help, and any blocked adult site is linked with hit-adult.opendns.com loading block.opendns.com.

    And yes, I also get occasionally alerts from my software firewall regarding port 445 and hit-nxdomain.opendns.com. I would believe that if the computer tries to establish a file sharing connection with a non-existing host, it is redirected to hit-nxdomain.opendns.com, and this continues to use the original port, even for an internal IP address.
    • CommentAuthorsparko
    • CommentTimeApr 22nd 2008
     permalink
    what they signify (reasonable guess):
    Rather than a "non-existent" host, I suspect that's the result of having filtering enabled. When you request a page from a domain pegged to a 'blocked' category, your browser is redirected, first to an OpenDNS webserver bound to a subdomain named to match filtering category, then to block.opendns.com which serves the resultant "blocked" webpage.

    "why do they show up but they don't exist?"
    the webserver domains handling category/block probably don't issue a response when you visit them 'directly' -- they only respond when referer=XYZ

1 to 4 of 4

  1.  

This discussion has been inactive for longer than 30 days, and is thus closed.