# authentications (default).
PermitUserEnvironment no
+# Send a message after the given seconds of inactivity through the encrypted
+# channel. Used to detect stale connections more quickly. Not necessary on all
+# servers, therefore deactivated here.
+#ClientAliveInterval 60
+# Disconnect the client if more than max count alive messages were lost
+# (default). With the setting above this detects a broken connection after 3
+# minutes.
+ClientAliveCountMax 3
+
# Enable sftp (and sshfs) usage.
Subsystem sftp internal-sftp