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The TCP/IP Guide - FTP Data Connection Management, Normal (Active) and Passive Data Connections and Port Usage
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FTP can't open data connection for transfer of / from windows command prompt only – It`s simple when you know how !
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vsftpd - vsftp server returning 500 Illegal PORT command when tried to run raw ftp commands in telnet - Unix & Linux Stack Exchange
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ftp.exe doesn't work in Azure – Fail to send PORT command in FTP with NAT – 500 Illegal PORT command. | Nino Crudele- #Azure #AzureGovernance #Governance #Cybersecurity #Security
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