THE INFORMATION IN THIS ARTICLE APPLIES TO:
- CuteFTP Pro® (All Versions)
In most cases, CuteFTP does not have any problems working behind a router. If you have problems, try doing all transfers in PASV mode.
If connections or transfers still fail:
- Check with the FTP server administrator to make certain the server and its network are configured to allow FTP in PASV mode.
- Check your router documentation for information on how to set the connections for FTP, or how to open the appropriate ports. FTP generally uses port 21.
- You can define a port range for CuteFTP on the Tools > Global Options> Connection by selecting the Assign PORT mode IP address and port range check box.
- You can try using UPnP if your NAT or router supports it to establish a connection properly. You can turn on port mapping on the Tools > Global Options > Connection tab.
- To perform transfers in PORT mode, or for secure transfers, refer to your router's documentation for information on how to configure the router for such transfers.
- If you are behind a NAT firewall, and the Secure FTP server is on a different network, you can only make data transfers in PORT mode using a Clear Command Channel SSL connection.