Query DNS servers to see which ones are blocking archive.org

query_dns.py

import dns.resolver
from dns.exception import Timeout
import json
import time

f = open('in.json')
ips = json.load(f)

good = set()
bad = set()
timeout = set()
res = dns.resolver.Resolver() 
res.timeout = 2
res.lifetime = 2
for ip in ips:
    if ip['state'] != 'valid':
        continue
    res.nameservers = [ip['ip']]
    print 'checking', ip['ip']
    try:
        a = res.query('archive.org')
    except Timeout:
        timeout.add(ip['ip'])
        print '  timeout'
        continue
    except Exception:
        print '  fail'
        continue
    for rdata in a:        
        if rdata.address == '207.241.224.2':
            good.add(ip['ip'])
        else:
            bad.add(ip['ip'])
            print '  BAD', ip['ip']