TCP not working when needed

  • jerminator4427


    I am having a issue with Jperf and Iperf.

    The strange thing is: when I want to test a port that is TCP, it will not work. If I test it with UDP, It will work.
    As you can see TFTP is UDP, but if I test it with UDP it will not work. It will only work with TCP.

    Poortnumber Protocol                              UDP                  TCP
    21                         FTP                                                                     x
    22                         SSH/SCP                                                     x
    23                         Telnet                                                             x
    25                         Mail                                                                     x
    69                         TFTP                                         x
    80                         HTTP                                                             x
    143                         IMAP                                                             x
    443                         HTTPS                                                             x
    992                         Telnet over TLS/SSL                 x                     x
    993                         IMAP over TLS/SSL                 x                     x
    3389                 RDP                                         x                     x
    5001                 Iperf                                                             x

    Please help,

    Thank you.