From: T@invalid.invalid   
      
   Hi All,   
      
   Two me over two years, but I finally figured it out!   
     AAAAHHHH !!!!!!    
      
   Fedora 43   
   vsftpd-3.0.5-11.fc42.x86_64   
      
   Windows 10 & 11   
   Cobian Reflector (all versions)   
      
   Cobian Reflector reports this error message when backing up to vsftp:   
      
         Only one usage of each socket address (protocol/network address/   
         port) is normally permitted   
      
   I have asked this question a couple of times here thinking the   
   problem was vsftp.  It was not.   
      
   I have reported the issue to Cobian thinking maybe it was his issue.   
   I also was not.   
      
   It turn out that the issue is with the Windows Operating system itself.   
   Windows defaults   
        MaxUserPort  to 4000 (sockets)   
        TcpTimedWaitDelay to 120 (seconds)   
      
   Cobian is throwing a YUGE bit bucket at vsftp and runs out of sockets,   
   then tries to reuse them before the "TcpTimedWaitDelay" expires.   
      
      
   Here is the fix.   
      
   REGEDIT4   
    References:   
      
   https://help.socketlabs.com/docs/how-to-fix-error-only-one-usage   
   of-each-socket-address-protocolnetwork-addressport-is-normally-permitted   
      
   https://stackoverflow.com/questions/36669406/cant-find-maxuserpo   
   t-registry-editor   
      
   https://superuser.com/questions/320763/how-to-change-tcp-time-wa   
   t-delay-in-windows-7-2008-server   
      
   https://hstechdocs.helpsystems.com/manuals/globalscape/archive/s   
   cureserver3/Windows_Registry_keys_for_TCP_IP_Performance_Tuning.htm   
      
    This is to correct the Cobian Reflector error when using vsFTP, and   
   maybe other problems too:   
       Only one usage of each socket address (protocol/network   
   address/port) is normally permitted   
      
    MaxUserPort    default to 4000 (sockets)   
    TimesWaitDelay default is 120 (seconds)   
      
   [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]   
   "MaxUserPort"=dword:0000fffe   
   "TcpTimedWaitDelay"=dword:0000001e   
      
   -T   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)