You can get all the details on the Windows Server advanced firewall netsh commands from Technet.įinally, from a client machine outside your network (to simulate real user connections) connect in passive mode using FileZilla client for Windows. This command disables the blocking of FTP traffic allowing the requreid ports to be opened only when needed. netsh advfirewall set global StatefulFtp enable Rather than creating a rule to open all those TCP ports (41500-65535) Windows Server is smart enough to recognise when a high numbered port is needed for data transfer in a FTP session. netsh advfirewall firewall add rule name="FTP (non-ssl)" action=allow protocol=TCP dir=in localport=21 Using the administrative command line you can specify that you want to open the following ports on your Windows Server firewall. Use any thirdparty Windows FTP command-line client instead. It switches only the server to the passive mode, but not the client. It makes it pretty useless nowadays due to ubiquitous firewalls and NATs. FTP uses only TCP ports so you don’t need to open any UDP ports.Ĭonfiguring Windows Server Advanced firewall rules for FTP 81 The Windows FTP command-line client ( ftp.exe) does not support the passive mode, on any version of Windows. en. WinSCP is opensource, it supports passive and active FTP connection modes, and has a many more features e.g. We have the internal IP address on the LAN of our FileZilla FTP server and the protocol and port ranges that need to be opened. 1 Instead of ftp.exe, use WinSCP (if possible). Here we can see the firewall rules that I have setup for FTP and FTPS. If you have connection issues manually enter your fixed IP in the box below by altering the radio button. For my sever using Default correctly identifies the fixed IPv4 public Internet address of the server. The problem in this case is that the server may also be behind some firewall. Passive mode allows the client to establish both channels, so the firewall won’t block the FTP connection. In such a case, passive mode can be useful. Here we are telling FileZilla server to use the range of ports that we are going to open on our firewall. The issue is that if the client is behind a firewall, remote connections may be blocked. With many users being protected by corporate firewalls, NAT and SPI (Stateful Packet Inspection) Routers it can be tough job.Īn excellent technical background on exactly what happens during the FTP process and the differences between Active and Passive FTP can be found here Ĭonfiguring FileZilla on Windows to accept Passive FTP connectionsĬonnect to your FileZilla server interface and click on the Passive mode settings The biggest problem with FTP is that in order to create a connection both parties must be able to communicate over the same ports for both commands and data. FTP (File Transfer Protocol) may seem a bit old hat in the days of peer-to-peer but is still one of the most widely used transfer protocols, especially in business.
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