def CheckOnLine(hostname):
    DeviceTTl = Getttl(hostname)
    if 200 > DeviceTTl > 0:
        print(hostname, "  TTL -  ", DeviceTTl, '  is up!')
        time.sleep(2)
        return True
    elif DeviceTTl == 250:
        print(hostname + " problem in Device 250")
        return False
    else:
        print(hostname, '  OFFLINE!')
        return False


def Getttl(ip):
    try:
        result = os.popen("ping -n 1 " + ip).read()
    except Exception as e:
        print(e)
        return -1
    else:
        n = result.find("TTL=")
        if n > 0:
            ttl = result[n + 4:]
            print(ttl)
            n = ttl.find("\n")
            if n > 0:
                print(ttl[:n])
                return int(ttl[:n])
    return -1