I have a user in another companies network. They can log into my FTP server fine. They are getting an FTP 550 error when they try a put or a get. If I log in from the internal network with the user's ID and password I am able to make a put or get. I have tried the FTP Server from Win2000 and Solaris 8, and used both IE and command line as a client. Works from inside the network, but not outside.
Could this be a port issue? I have opened port 20 and 21 in the firewall between the two companies.
Could it be a PASV issue where the FTP server is trying to use a higher port not allowed through the firewall?
Any help would be great.