• ed25519 support can be enabled on dropbear

Replacing Dropbear by openssh-server

nano /etc/config/dropbear #change port to 2222
/etc/init.d/dropbear restart

ssh -p 2222 root@IP
opkg update && opkg install openssh-server
/etc/init.d/sshd enable && /etc/init.d/sshd start
mkdir .ssh && nano .ssh/authorized_keys

ssh root@IP
nano /etc/ssh/sshd_config #Change PasswordAuthentication & ChallengeResponseAuthentication to no
/etc/init.d/dropbear disable && /etc/init.d/dropbear stop && /etc/init.d/sshd restart

opkg install openssh-sftp-server #Not needed