<h2>Edit File: query_specific.py</h2><form method="post"><textarea name="content" rows="20" cols="80">#!/usr/bin/env python3

# Two ways of querying a specific nameserver.

import dns.message
import dns.rdataclass
import dns.rdatatype
import dns.query

# This way is just like nslookup/dig:

qname = dns.name.from_text(&quot;amazon.com&quot;)
q = dns.message.make_query(qname, dns.rdatatype.NS)
print(&quot;The query is:&quot;)
print(q)
print(&quot;&quot;)
r = dns.query.udp(q, &quot;8.8.8.8&quot;)
print(&quot;The response is:&quot;)
print(r)
print(&quot;&quot;)
print(&quot;The nameservers are:&quot;)
ns_rrset = r.find_rrset(r.answer, qname, dns.rdataclass.IN, dns.rdatatype.NS)
for rr in ns_rrset:
    print(rr.target)
print(&quot;&quot;)
print(&quot;&quot;)

# A higher-level way:

import dns.resolver

answer = dns.resolver.resolve_at(&quot;8.8.8.8&quot;, &quot;amazon.com&quot;, &quot;NS&quot;)
print(&quot;The nameservers are:&quot;)
for rr in answer:
    print(rr.target)
print(&quot;&quot;)
print(&quot;&quot;)

# If you&#039;re going to make a bunch of queries to the server, make the resolver once
# and then use it multiple times:

res = dns.resolver.make_resolver_at(&quot;dns.google&quot;)
answer = res.resolve(&quot;amazon.com&quot;, &quot;NS&quot;)
print(&quot;The amazon.com nameservers are:&quot;)
for rr in answer:
    print(rr.target)
answer = res.resolve(&quot;google.com&quot;, &quot;NS&quot;)
print(&quot;The google.com nameservers are:&quot;)
for rr in answer:
    print(rr.target)
print(&quot;&quot;)
print(&quot;&quot;)

# Sending a query with the all flags set to 0.  This is the easiest way
# to make a query with the RD flag off.
#
# This sends a query with RD=0 for the root SOA RRset to the IP address
# for l.root-servers.net.

q = dns.message.make_query(&quot;.&quot;, dns.rdatatype.SOA, flags=0)
r = dns.query.udp(q, &quot;199.7.83.42&quot;)
print(&quot;\nThe flags in the response are {}&quot;.format(dns.flags.to_text(r.flags)))
print(&#039;The SOA in the response is &quot;{}&quot;&#039;.format((r.answer)[0][0]))
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