FileZilla Forums

I think I have understood the need to manage Dynamic DNS when the external IP of my server is changing, but how do I manage the situation where the external IP of my clients are changing (daily) and, for security reasons, I must set the server to block ALL requests, allowing only certain specified external IPs to connect ?

If the IPs are all part of a special range, you can whitelist that IP range (use CIDR notation). If they are totally random, you simply cannot filter by IP.