What is FXP?
FXP is a term adopted by earlier clients which provided site to site FTP transfers. Q: When trying to transfer files from one site to another I keep getting this error 500 illegal port command. A: The FTP Server is set up to not allow or doesn’t support FXP. Located in the Site Manager on the Advanced tab, you will find the option “alternative fxp method”. By enabling upload/download (depending on the direction of the transfer), you may be able to get the server to allow FXP. Note: It is common for some sites to only allow FXP in one direction and not the other. By enabling alternative fxp method, this problem is sometimes solved.