Response: 220-You are user number 20 of 500 allowed. Response: 257 "/" is your current locationīelow is the log for passive mode: Status: Resolving address of Status: Server does not support non-ASCII characters. Response: 220 You will be disconnected after 3 minutes of inactivity. Response: 220-This is a private system - No anonymous login Response: 220-You are user number 22 of 500 allowed. Status: Connection established, waiting for welcome message. It connects but fails to give directory listing.īelow is the complete log for active mode Status: Resolving address of I tried both passive and active mode but all in vain. It was working when I was using broadband but when I use my college internet it says: Error: Connection timed outĮrror: Failed to retrieve directory listing Route port range for data connections on Microsoft Azure firewall/NAT.I am trying to connect to a FTP server with Filezilla.Configure port range for data connections and external IP address on Microsoft IIS FTP Server.Server sent passive reply with unroutable address. The resulting nmap will show 'closed' rather than 'filtered' as 'closed' means the request is not being dropped by the firewall, and the server can later initiate a service on those ports. 3 You can tell that this happened from a session log: You will need to ensure these ports are open in your firewall. By default WinSCP detects, when an unroutable IP address is provided, and uses a server (control connection) address instead. It is common, that the FTP server is not configured properly and provides its internal IP address, that cannot be used from a client network. When the FTP server is behind a NAT, it needs to know it’s external IP address, so it can provide it to the client in a response to PASV command. And the same range has to be opened/routed on the firewall/NAT. Typically, the FTP server software has a configuration option to setup a range of the ports, the server will use. The firewall and NAT on the FTP server side have to be configured not only to allow/route the incoming connections on FTP port 21, 2 but also a range of ports for the incoming data connections. However, I can connect to the FTP server using the console : ftp ftp> open Connected to 220 Bienvenue sur le serveur FTP. The FTP client doesnt make the actual connection to the data port of the server-it. I searched on Google/SO and found that it might be a TLS problem. The main problem with active mode FTP actually falls on the client side. Notes for Uncommon Local Network Configurations The data connection could not be established: EHOSTUNREACH - No route to host.Use Passive mode session settings to toggle between the active and the passive mode. In passive mode, the PASV command is sent by the client, and the server responds with the high-numbered port on which it will accept the data connection. In the passive mode, the client uses the control connection to send a PASV command to the server and then receives a server IP address and server port number from the server, which the client then uses to open a data connection to the server IP address and server port number received. 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. ADSL modem), unable to accept incoming TCP connections.įor this reason the passive mode was introduced and is mostly used nowadays. built-in Windows firewall) or NAT router (e.g. Nowadays, it is typical that the client is behind a firewall (e.g. In the active mode, the client starts listening on a random port for incoming data connections from the server (the client sends the FTP command PORT to inform the server on which port it is listening).
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