[~] ssh username@node.legacy
Unable to negotiate with 10.10.10.10 port 22: no matching cipher found. Their offer: arcfour,arcfour128,arcfour256

[~] ssh -Q cipher
3des-cbc
aes128-cbc
aes192-cbc
aes256-cbc
rijndael-cbc@lysator.liu.se
aes128-ctr
aes192-ctr
aes256-ctr
aes128-gcm@openssh.com
aes256-gcm@openssh.com
chacha20-poly1305@openssh.com

[~] ssh -vv -c arcfour username@node.legacy
Unknown cipher type 'arcfour'