ftp security

Hi, I am looking for port 21 brute force iptables protection. I have until now: iptables -A INPUT -p tcp -m tcp --dport 21 -j ACCEPT iptables -I FORWARD -p tcp --dport 21 -m state --state NEW -m limit --limit 3/min -j ACCEPT iptables -I FORWARD -p tcp --dport 21 -m state --state...

Ok, so I found an old thread here https://www.snbforums.com/threads/merlin-firmware-anyway-to-encrypt-ftp.21317/ that pretty much covers my question. Basically, I would like to find a way to secure the FTP server on Merlin FW. I'm using RT-AC3200. @redhat27 you mentioned SCP could be an...