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  1. #1
    Join Date
    Jul 2005
    Location
    Adelaide South Australia
    Posts
    2

    How to ping ports?

    I have set up a ts server on my home computer and have port forwarded all the necessary ports in my router but people still cant connect to the server. I was just wondering if anyone knew how to ping a certain port so that I can make sure that a connection can get through. Thanks

  2. #2
    Join Date
    Jan 2003
    Location
    Germany
    Posts
    4,140
    You can't. Ping is the program that sends ICMP echo requests to a machine.
    Ports are part of the session layer for the TCP and UDP protocol, however the ICMP protocol doesn't have ports. It doesn't even have a session layer.

  3. #3
    Join Date
    Aug 2002
    Location
    Silicon Valley
    Posts
    45
    Download nmap

    You can use it to scan TCP or UDP ports.

    You would use something like:

    nmap -sT -p 14534,51234 192.168.1.1

    and

    nmap -sU -p 8767 192.168.1.1

    Just type nmap by itself to see what the command options are.

  4. #4
    Join Date
    Jan 2003
    Location
    Germany
    Posts
    4,140
    Since you're probably running a Windoze system at home you might be better off with a Windoze portscanning utility like for example Superscan from Foundstone.

  5. #5
    Join Date
    Jul 2005
    Location
    Adelaide South Australia
    Posts
    2
    Thanks guys, I was just about to ask if you knew of any port scanning programs. I will give them a try

    And yes I am using a windows XP system

  6. #6
    opac Guest
    Code:
    UDP scans: This method is used to determine which UDP (User Datagram Protocol,
    RFC 768) ports are open on a host. The technique is to send 0 byte udp packets to
    each port on the target machine. If we receive an ICMP port unreachable message,
    then the port is closed. Otherwise we assume it is open.
    If you didn't configure your router correctly you will get no port unreachable -> it will claim port open.
    If everything is configured correctly, you will not get the icmp port unreachable message -> it will claim port open.

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