Add this line to sshd or replace it, and remove ciphers of less than 2000 from the moduli
echo 'KexAlgorithms ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521, diffie-hellman-group14-sha1, diffie-hellman-group-exchange- sha1,diffie-hellman-group- exchange-sha256' > /etc/ssh/sshd_config
awk '$5 > 2000' /etc/ssh/moduli > /tmp/moduli; cp /tmp/moduli /etc/ssh/moduli