Also die /etc/ssh/sshd_config vom NAS:cat /etc/ssh/sshd_config
Ciphers aes128-ctr,aes128-gcm@openssh.com,aes192-ctr,aes256-ctr,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com
KexAlgorithms curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256
MACs...