Specifying ciphers and protocol 2 in .ssh/config

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http://unix.stackexchange.com – I would like to be able to specify in my .ssh/config file that ssh uses protocol 2 (command line argument -2), and which ciphers to use with it. The following does not seem to work (I get bad configuration option: Cyphers) Host XXX HostName YYYY User ZZZZ Compression no Cyphers arcfour,blowfish-cbc ControlPath ~/.ssh/%r@%h:%p IdentityFile ~/.ssh/seas/id_rsa Also, how do I know which version of ssh (or OpenSSH) I am using? which ssh or man ssh does not reveal much information. (HowTos)