ns check

import socket
import dns.resolver


with open('domainlist.txt') as f:
    domain_list = [line.strip() for line in f.readlines()]

for domain in domain_list:
    resolver = dns.resolver.Resolver()
    nameservers = resolver.query(domain, 'NS')
    for ns in nameservers:
        resolver.nameservers=[socket.gethostbyname(str(ns))]
        try:
            q = resolver.query(domain, 'A')
        except dns.resolver.NoNameservers as NN:
            print(f'{domain}: VULNERÁVEL - {str(ns)}')
        except dns.resolver.NoAnswer as NA:
            print(f'{domain}: não vulnerável')
        break