ðə pˈɜːpəs ʌvðə juːtˈɪlᵻɾi ɪz tʊ ɐlˈɜːt ðə jˈuːzɚz ʌv ˌɛni pˈoːɹts ðæt hɐvbɪn ˈoʊpənd θɹuː ðɛɹ fˈaɪɚwɔːlz ɔːɹ θɹuː ðɛɹ ˌɛnˌeɪtˈiː ɹˈaʊɾɚz, wˌɪtʃ kæn biː jˈuːzd baɪ mɐlˈɪʃəs jˈuːzɚz tə tˈeɪk ɐdvˈæntɪdʒ ʌv sᵻkjˈʊɹɹᵻɾi vˌʌlnɚɹəbˈɪlᵻɾiz.
The purpose of the utility is to alert the users of any ports that have been opened through their firewalls or through their NAT routers, which can be used by malicious users to take advantage of security vulnerabilities.