Sorry, this has to be edited for security reasons…
Host [hostname1] [hostname2] [hostname3]
ProxyCommand ssh [hostname] /usr/local/bin/nc -w 5 %h %p
Host [hostname1] [hostname2] [hostname3]
Compression yes
# defaults
Host *
Protocol 2,1
PubkeyAuthentication yes
RSAAuthentication yes
PasswordAuthentication yes
[...]