How to create a very simple DNS server using Python?

Question

I just want to create a DNS Server who listen to requests and always return the same specific ip. I'm using Python....

Answer 1

Take a look at the dnslib module, specifically, dnslib.server.

class TestResolver:
     def resolve(self,request,handler):
         reply = request.reply()
         reply.add_answer(*RR.fromZone("abc.def. 60 A 1.2.3.4"))
         return reply
resolver = TestResolver()
server = DNSServer(resolver,port=8053,address="localhost",logger=logger,tcp=True)
server.start_thread()
a = q.send("localhost",8053,tcp=True)
    Request: [...] (tcp) / 'abc.def.' (A)
    Reply: [...] (tcp) / 'abc.def.' (A) / RRs: A
print(DNSRecord.parse(a))
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: ...
    ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
    ;; QUESTION SECTION:
    ;abc.def.                       IN      A
    ;; ANSWER SECTION:
    abc.def.                60      IN      A       1.2.3.4
server.stop()