import re
string_ = '''192.168.1.1,192.168.1.2/32,192.168.1.5-192.168.1.7,reject,any,ip_address
reject,192.168.1.1/32,reject,any,
172.168.1.4-172.168.1.4,reject'''
ip_rx = r'\d{1,3}(?:\.\d{1,3}){3}(?:/\d+)?'
block=r"(?:{0}(?:-{0})?|reject|any)".format(ip_rx)
print(bool(re.search(r'^{0}(?:\s*,\s*{0})*$'.format(block), string_)))
aW1wb3J0IHJlCnN0cmluZ18gPSAnJycxOTIuMTY4LjEuMSwxOTIuMTY4LjEuMi8zMiwxOTIuMTY4LjEuNS0xOTIuMTY4LjEuNyxyZWplY3QsYW55LGlwX2FkZHJlc3MKcmVqZWN0LDE5Mi4xNjguMS4xLzMyLHJlamVjdCxhbnksCjE3Mi4xNjguMS40LTE3Mi4xNjguMS40LHJlamVjdCcnJwppcF9yeCA9IHInXGR7MSwzfSg/OlwuXGR7MSwzfSl7M30oPzovXGQrKT8nCmJsb2NrPXIiKD86ezB9KD86LXswfSk/fHJlamVjdHxhbnkpIi5mb3JtYXQoaXBfcngpCnByaW50KGJvb2wocmUuc2VhcmNoKHInXnswfSg/OlxzKixccyp7MH0pKiQnLmZvcm1hdChibG9jayksIHN0cmluZ18pKSk=