IIS uses the port you specified in “ Data Channel Port Range” field only via secure FTP service. Instead, it uses a random port number in the range from 1025 through 65535. Note: For the unsecure FTP service, IIS doesn’t use the port you assigned. Then check the IIS logs in this folder: c:\inetpub\logs\LogFiles\FTPSVC2. ConfirmationĬonnect to your FTP host via an FTP client to confirm that the FTP service uses only the assigned port. Note: If the “Data Channel Port Range” field is grayed out, make sure that you are changing the server-level settings. Using a single server port will result in having the same combination which may result in the concurrent FTP requests to be rejected. The FTP sessions are uniquely identified thanks to this combination. However, it is not recommended because using single port will limit the number of “ Client IP – Client Port – Server Port” combinations. After this change, make sure to restart “Microsoft FTP Service” ( Start > Run > services.msc).Īs you see in the example above, it is technically possible to use IIS FTP over a single port. The short answer is “Yes” but there is a specific format you should enter the value in.įor using IIS FTP via a specific port, go to “FTP Firewall Support” module in IIS and enter the port number twice with a dash sign (-) between in the “ Data Channel Port Range” field. Open FileZilla and at the top of the window fill in the server external address (what you put in for ), username, password, and port, and press. This is question that could be asked: Is it possible to use a single port instead of a port range for IIS FTP? Redirect target port: Other 60000 Description: FTP passive port forward Filter rule association: Create new associated filter rule Click Save and Apply Changes on the next page. The server then connects to the clients data port from a source port of 20 (or the command port minus 1). Send feedback to for Microsoft Windows XP, 2000, 2003 Server, Vista, Windows 7, and Windows 95/98/NT4.When in passive mode, IIS asks for a port range for the FTP service. Note: If the FTP control channel is encrypted, a deep inspection firewall will not be able to parse the PASV reply to get the port number. If you are intending to connect to any FTP server on the Internet, then you’ll need to allow the entire ephemeral port range (typically 1024 through 4999). If you don’t have a deep inspection firewall, and you know in advance the port range used by the FTP server in question, you can allow that port range. If you have a deep inspection firewall, it will see the PASV reply and then dynamically open a hole for that port for a short time to allow the connection. (The client then connects to the remote host:port and the data transfers occur.) It does not apply to passive mode transfers because in that case, the FTP server chooses the data port and responds to the PASV command with that information. The ActivePortRangeStart and ActivePortRangeEnd properties can be used to control the port range chosen by the Chilkat FTP2 component for active mode transfers. Our IS administrator prefers to limit the number of open outbound ports that exist in our company’s firewall. Do these only work with active connections or can they be used to limit the outbound ports of a passive connection? I saw that your DLL provides ActivePortRangeStart and ActivePortRangeEnd properties. Is there a way to know what outbound port range is being used for a Passive SSL FTP connection?
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