Applicable to:
- Plesk for Windows
Symptoms
-
FTP is not accessible with the error below:
CONFIG_TEXT: Error: Connection timed out after 20 seconds of inactivity
Error: Failed to retrieve directory listing -
There are several internal IP addresses with assigned to the external IP addresses.
-
When connection is established from the server with the debug mode in Filezilla, the following records appear:
CONFIG_TEXT: Response: 227 Entering Passive Mode (203,0,113,2,192,7).
Trace: CFtpRawTransferOpData::ParseResponse() in state 2
Trace: CControlSocket::SendNextCommand()
Trace: CFtpRawTransferOpData::Send() in state 4
Trace: Binding data connection source IP to control connection source IP 192.0.2.2
Command: LIST
Trace: CTlsSocketImpl::OnRead()
Trace: CFtpControlSocket::OnReceive()
Response: 150 Opening BINARY mode data connection.
Trace: CFtpRawTransferOpData::ParseResponse() in state 4
Trace: CControlSocket::SendNextCommand()
Trace: CFtpRawTransferOpData::Send() in state 5
Error: Connection timed out after 20 seconds of inactivity
Trace: CRealControlSocket::DoClose(2050)
Trace: CControlSocket::DoClose(2050)
Trace: CFtpControlSocket::ResetOperation(2114)
Trace: CControlSocket::ResetOperation(2114)
Trace: CFtpRawTransferOpData::Reset(2114) in state 5
Trace: CFtpControlSocket::ResetOperation(2114)
Trace: CControlSocket::ResetOperation(2114)
Trace: CFtpListOpData::Reset(2114) in state 3
Error: Failed to retrieve directory listingWhereas, IP address 203.0.113.2 is bound with 192.0.2.3 internal IP in IIS > Sites > 192.0.2.3 > FTP Firewall Support > external IP address of Firewall.
- When the external IP address of Firewall is set to none, connection from the server over internal IP address is established fine.
Cause
Misconfigured routing/external Firewall settings.
Resolution
Contact your Hosting Provider in order to check NAT routing/filtering on the server.
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