Enormous quantities of our customers grant their site architects to have restricted permission to the server due to wellbeing reasons.


Consequently, planners routinely use FTP clients like FileZilla to move and download records from the server, they go over this slip-up message. Around here at ARZHOST, we have seen a couple of such FTP-related errors as a component of our Server Management Services for the web has an online expert center. What It Means and How to Fix It Server Sent Passive Reply with Unroutable?

Today “Server-Sent Passive Reply with Unroutable Address Passive Mode Failed”, will examine the causes and their specific fixes for this error message.

How do we fix the FTP error Server sent a dormant reply with an Unroutable area?

As of now, “Server-Sent Passive Reply with Unroutable Address Passive Mode Failed”, let’s see the critical purposes behind this FTP misstep and how our Hosting Expert Planners fix it.

1. Dreadful firewall settings

Lately, one of our customers advanced toward us with this mix-up message. Using server address rather while interfacing with an FTP site. On checking, we saw that disconnected ports were not allowed on the firewall settings. This results in clients inadequate to connect with their server from the outer association.

Subsequently, “Server-Sent Passive Reply with Unroutable Address Passive Mode Failed”, we teak the firewall setting as adding segregated ports range in firewall settings.

2. NAT game plan

One more customer protested his FTP connection when he endeavored to interface the FTP server with FileZilla and get the going with errors. The server sent an inactive reply with an Unroutable area. Using server address taking everything into account.

On exploring, we saw that the FTP client was behind NAT. Regardless, the FTP show doesn’t support NAT using any means. Also, the client unequivocally enlightens the server in unique mode to open a discretionary relationship with the server IP address, which will not work if the client is behind NAT.

Consequently, “Server-Sent Passive Reply with Unroutable Address Passive Mode Failed”, we change the, etc/vsftpd.conf record as underneath

  • pasv_address=<you. external. IP>

Finally, this appropriates the screw-up.

FTP Client Operations in PASSIVE mode crash and burn directly following fixing with 5020402_1 fix pack

“Server-Sent Passive Reply with Unroutable Address Passive Mode Failed”, Genuine B2B Integrator’s (SBI) FTP Client Business Process (BP) is interfacing with an outcast FTP server in PASSIVE mode and FTP Client undertakings (exercises that require data connection e.g., list, put, get, etc) misfire with an error message “Response not set in stone break came to. Closing connections.”

Cause FTP Client Operations in PASSIVE mode crash

Right when the SBI FTP Client issues a PASSIVE request to the server, FTP Server is returning an IP address that isn’t exactly as old as is used in FTP Begin Session. Exactly when the Client issues data relationship with this new IP and port, the server doesn’t complete it therefore client BP keeps it together for Response Timeout long and times out. Additionally, it is the right lead from the Client.

Be that as it may, “Server-Sent Passive Reply with Unroutable Address Passive Mode Failed”, is an issue with an untouchable FTP server being used. Either server needs to respond to the Client with the right IP or fit for regarding data relationship at the IP/port it is responding with.

Fix made through APAR IC92859 in SBI fix pack 5020402_1 to meet FTP RFC grants SBI FTP client to regard IP returned by the server. Prior SBI fix packs don’t have this issue regardless when a server doesn’t act adequately as referred to above and reliably uses the IP address used in Begin Session.


“Server-Sent Passive Reply with Unroutable Address Passive Mode Failed”, Genuine B2B Integrator fix pack 5020402_1 and later

Settling The Problem

Anyhow the way that it is a pariah FTP server issue, the SBI FTP Client has a workaround to smother fix made in APAR IC92859 to allow a client to use an IP address from FTP Begin Session reliably.

Here is the default property arrangement from the sFTP client. properties.

  • ##Flag to enable or injure to regard PASV request.
  • ######If the flag is set to substantial, FTP Client will interface with have returned by PASV request
  • # If the pennant is set to counterfeit, FTP Client will connect with the principal have which is referred to in the client bp.
  • Valid characteristics:
  • ## ##substantial: (default)
  • ## false:


Follow this workaround –

  1. Add this line in present/properties/customer_overrides.properties [create archive, it doesn’t exist]
  • honourPASV=false
  1. restart SBI center points


To lay it out simply, this error happens in light of terrible server settings or when an FTP client is behind NAT. Today, “Server-Sent Passive Reply with Unroutable Address Passive Mode Failed”, we saw how our Hosting Expert Planners fix it.

People Frequently Ask

Question # 1: How do I fix Server sent passive reply with an Unroutable address?

Answer: Go to the ServU settings at Global Limits & Settings > Settings – Network Settings. Ensure the Auto-configure firewall through the UPnP checkbox is not checked. Ensure the Packet time-out is set to 300 seconds. Set PASV Port Range is 50,000-50,009, and port forward these ports to your router.

Question # 2: How do I turn on the passive mode in FileZilla?

Answer: Enabling passive mode

  1. Start the FileZilla program if it isn’t already running.
  2. Click Edit, Settings in the menu bar. The “FileZilla Options” window will appear.
  3. Select Connections, then FTP on the left-hand side.
  4. Choose the Passive (recommended) option.

Question # 3: What are active and passive FTP?

Answer: 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.

Question # 4: How do I change my FTP channel port range?

Answer: 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. Once you have entered the port range for your FTP service, click Apply in the Actions pane to save your configuration settings.

Question # 5: How do I turn off passive mode in the FileZilla server?

Answer: If you encounter problems using FileZilla, a firewall on your computer or network may be interfering with the connection. Turning off Passive Mode in the FileZilla settings will usually solve this. The FileZilla Options window will appear. Click OK to close the window.