While using the 3.x FW-1 FTP Security Server, the user sees the following error message when trying to use FTP get or put commands:
550 Security server failed to perform requested command
FW-1's FTP Security Server sends a pwd command prior to any data connection command (such as get, put, ls), since it needs to know the current directory for purposes such as logging, virus inspection, and resources. FW-1 assumes that these commands are blocked whenever the pwd command is blocked. Therefore, do not disable pwd on your FTP server.