What is passive port range?

What is passive port range?

In FTP’s passive (PASV) mode, transfers and directory listings are performed on a separate network connection to the control connection, which is typically on port 21. It is recommended to set a passive port range of 100, and the range should be between 1024 and 65535.

How do I enable passive mode in IIS?

Step 1: Open Start > Settings > Control Panel > Firewall. Step 2: Add the TCP ports 5001-5008 to the firewall exception list. Now you should be able to connect to ftp server with passive transfer mode.

What is Data Channel port range?

1025 through 65535
Data Channel Port Range Specifies the port range for passive connections used for data channel connections. The valid range for ports is 1025 through 65535. (Ports from 1 through 1024 are reserved for use by system services.)

How do I allow passive FTP through firewall?

Click the policy to be applied on the FTP server, and then click Details. In the new window, click Firewall > Assign/Unassign… If the firewall is set to “Stateful Inspection Enable”, add the following rules: Allow solicited TCP/UDP replies.

Is passive or active FTP more secure?

Active FTP provides security to the FTP server. Passive FTP does not provide security to the FTP server. Active FTP may cause problems because of firewalls. Passive FTP does not have connection issues from firewalls.

What is the difference between active and passive FTP?

Active vs Passive FTP When an FTP connection is initiated, it begins with a control connection. In Passive Mode, the FTP server waits for the FTP client to send it a port and IP address to connect to. In Active mode, the server assigns a port and the IP address will be the same as the FTP client making the request.

How do I configure passive port range for the FTP service in IIS?

Step 1: Configure the Passive Port Range for the FTP Service Go to IIS 7 Manager. In the Connections pane, click the server-level node in the tree. Double-click the FTP Firewall Support icon in the list of features. Enter a range of values for the Data Channel Port Range.

How do I set up passive FTP?

A passive FTP connection follows the following process:

1. The client sends the PASV command to an FTP server on port 21. The source port is a random, high-numbered port.
2. The server responds with the PORT command.
3. The client initiates a connection to the server on this ephemeral port.
4. The server responds with an ACK.

What is passive mode?

“Passive mode” means that the server will be “passive” and accept data connections from the client, instead of requiring the client be able to accept connections back from the server. Almost all modern network client environments only permit outbound connection requests, for security reasons.

How many ports are needed for passive FTP?

Fill in a value for the “PASV Port Range”. SolarWinds recommends starting with 50000-50009; you can use a narrower port range if you never hit simultaneous transfers; use a wider port range if you support more simultaneous transfers. A range of 10 ports is usually sufficient for the busiest of file transfers.

What ports does passive FTP use?

Both the server and the client must support passive FTP for this process to work. When passive FTP is used, the client will initiate the connection to the server….Passive FTP Overview

• The client sends the PASV command to an FTP server on port 21.
• The server responds with the PORT command.

Why is passive FTP preferred?

Using the passive mode is preferable because most of the complex configuration is done only once on the server side, by experienced administrator, rather than individually on a client side, by (possibly) inexperienced users. Use Passive mode session settings to toggle between the active and the passive mode.

How to configure passive port range for the FTP service?

Following article will assist you to configure passive range for FTP service in IIS web server. Go to IIS Manager. In the Connections pane, Click on the server tree. Double-click the FTP Firewall Support icon. Enter a range of values for the Data Channel Port Range. For Example: Passive Port Range 10000 30000.

Can you use a single port instead of a port range in IIS FTP?

When in passive mode, IIS asks for a port range for the FTP service. This is question that could be asked: Is it possible to use a single port instead of a port range for IIS FTP? The short answer is “Yes” but there is a specific format you should enter the value in.

What kind of port number does IIS use?

Note: For the unsecure FTP service, IIS doesn’t use the port you assigned. Instead, it uses a random port number in the range from 1025 through 65535. IIS uses the port you specified in “ Data Channel Port Range ” field only via secure FTP service.

How to configure passive FTP connection in IIS 7?

In this section, you configure the server-level port range for passive connections to the FTP service. Use the following steps: Go to IIS 7 Manager. In the Connections pane, click the server-level node in the tree. Double-click the FTP Firewall Support icon in the list of features. Enter a range of values for the Data Channel Port Range.