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Thread: Router how to find port number for Web Management ?

  1. #1
    Senior Member
    Join Date
    Dec 2004

    Router how to find port number for Web Management ?

    Hi Expert

    I enabled D-Link (DSL-502T) router web management (I am aware of security implication).

    I was able remotely to login to the router (by typing http://23.45.xx.6y) before changing the default number 80.

    Then I changed the port number from the default value 80 to 21908 ( https option is not available) for better security, and when i tried to login to the router by typing this :


    Yes I am aware that if I am physically near to the router then I can check that , but this is not the case with me.

    How can i make sure that i had changed port number form 80 to 21908 ?

    Does NMAP do a trick to reveal which port is used for web management ? or are there other better options ?

    Last edited by zillah; August 2nd, 2010 at 03:41 AM.

  2. #2
    Gonzo District BOFH westin's Avatar
    Join Date
    Jan 2006
    SW MO
    Hi zillah - Try this:

    nmap -p 21908 23.45.xx.6y
    That will check to see if that port is open on that host. Of course you can swap 21908 for 80 to see if it is still running on the old management port.

    Hope this helps!
    \"Those of us that had been up all night were in no mood for coffee and donuts, we wanted strong drink.\"


  3. #3
    Senior Member
    Join Date
    Dec 2004
    Hi westin

    nmap -p 21908 23.45.xx.6y
    I did check that and nmap found it closed


  4. #4
    Senior Member
    Join Date
    Mar 2004
    why not telnet to the ip and port

    should be a simple y/n issue here

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