charon {
    # Section to define file loggers, see LOGGER CONFIGURATION in
    # strongswan.conf(5).
    filelog {
        # <filename> is the full path to the log file.
        /var/log/strongswan.log {

            # Loglevel for a specific subsystem.
            # <subsystem> = <default>

            # If this option is enabled log entries are appended to the existing
            # file.
            append = yes

            # Default loglevel.
            default = 2

            # Enabling this option disables block buffering and enables line
            # buffering.
            # flush_line = no

            # Prefix each log entry with the connection name and a unique
            # numerical identifier for each IKE_SA.
            ike_name = yes

            # Adds the milliseconds within the current second after the
            # timestamp (separated by a dot, so time_format should end with %S
            # or %T).
            # time_add_ms = no

            # Prefix each log entry with a timestamp. The option accepts a
            # format string as passed to strftime(3).
            # time_format =
        }
    }
}