SSH config file
SSH looks for config files in /etc/ssh/ssh_config and ~/.ssh/config, not in ~/.ssh/ssh_config. I'm not sure if ~/.ssh/ssh_config is standard in some systems, but it does not appear in the man pages OS X 10.10.
-F configfile Specifies an alternative per-user configuration file. If a configuration file is given on the command line, the system-wide configuration file (/etc/ssh/ssh_config) will be ignored. The default for the per-user configuration file is ~/.ssh/config.
- iTerm2 version: 2.9.20150626
- OS version: 10.10.4 (14E46)