Setting up FTP? Please help!

HAving never used an FTP or anything like it i find myself a bit stuck I need to be able to have a shopping platform connect to a folder on my PC to import my stock feed inventory SCV into thier system This is there vague instructions Your Stock and Price Feed needs to be available via a web accessible URL with access permissions for the range of IP addresses: Please allow all IPs in the following CIDR ranges: 46.37.179.0/24 78.137.122.0/24 80.66.203.0/24 109.108.141.0./24 109.108.155.0/24 e.g. for the CIDR range 80.66.203.9/24 this would be all IP addresses from 80.66.203.1 to 80.66.203.254 The feed should be in CSV format (Speak to your account manager for other formats) and can be gzipped if required. e.g. http://www.yoursite.com/feed/onbuy.csv.gz Is this the right FTP software and how? thanks in advance to anybody who can help