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is there any command to check whether internet connection is available at a certain port or not??...
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  1. #1
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    is there any command to check whether internet connection is available at a certain port or not??

  2. #2
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    Quote Originally Posted by kaushik016 View Post
    is there any command to check whether internet connection is available at a certain port or not??
    What are you trying to achieve?

    You could try using "nmap" . First you need to install it by typing either "yum install nmap" or "apt-get install nmap" depending if you are running red hat based or debian based distro.

    Then type " nmap -v -sT 127.0.0.1" where 127.0.0.1 is an ip address of your choice. My output is as below.
    Code:
    Starting Nmap 5.00 ( http://nmap.org ) at 2011-02-01 14:33 GMT
    NSE: Loaded 0 scripts for scanning.
    Initiating Connect Scan at 14:33
    Scanning localhost (127.0.0.1) [1000 ports]
    Discovered open port 80/tcp on 127.0.0.1
    Discovered open port 631/tcp on 127.0.0.1
    Completed Connect Scan at 14:33, 0.07s elapsed (1000 total ports)
    Host localhost (127.0.0.1) is up (0.00066s latency).
    Interesting ports on localhost (127.0.0.1):
    Not shown: 998 closed ports
    PORT    STATE SERVICE
    80/tcp  open  http
    631/tcp open  ipp
    
    Read data files from: /usr/share/nmap
    Nmap done: 1 IP address (1 host up) scanned in 0.30 seconds
               Raw packets sent: 0 (0B) | Rcvd: 0 (0B)

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