Host gargamex
    Hostname 172.23.0.3
    User root
    ProxyCommand ssh bastion -W %h:%p
    ForwardAgent yes
    IdentityFile /home/mate/Docker/bastion/gargamex-key 

Host bastion
    #ForwardAgent yes
    HostName 172.23.0.2
    User root
    ProxyCommand none
    IdentityFile /home/mate/Docker/bastion/bastion-key