Ping SSH server every 2 min.
Host *
# Allow sharing of multiple sessions over a single network connection for all
# host. Also don't prompt for password when connection live.
# This option was disabled to simplify use of port forwarding.
# You can enable it and pass "-s none" to ssh.
# ControlPath ~/.ssh/sock_%r@%h_%p
# ControlMaster auto
ServerAliveInterval 120
# This by default.
# UserKnownHostsFile ~/.ssh/known_hosts
# Enable compression. To turn on it manually invoke ssh with -C key.
Compression yes
# Prefer public key authentication.
PreferredAuthentications publickey,keyboard-interactive,password
PubkeyAuthentication yes
# Bypass locale env vars to remote host.
# Add to remote opensshd: AcceptEnv LANG LC_*
SendEnv LANG LC_*