Add an rule to csf denied hosts
    See :func:`_access_rule`.
    1- Deny an IP:
    CLI Example:

    .. code-block:: bash

        salt '*' csf.deny 127.0.0.1
        salt '*' csf.deny 127.0.0.1 comment="Too localhosty"

def deny(ip,
        port=None,
        proto='tcp',
        direction='in',
        port_origin='d',
        ip_origin='d',
        ttl=None,
        comment=''):
    '''
    Add an rule to csf denied hosts
    See :func:`_access_rule`.
    1- Deny an IP:
    CLI Example:

    .. code-block:: bash

        salt '*' csf.deny 127.0.0.1
        salt '*' csf.deny 127.0.0.1 comment="Too localhosty"
    '''
    return _access_rule('deny', ip, port, proto, direction, port_origin, ip_origin, comment)