Python basics: Socket, Dnspython

Introduction

You may want to perform processing such as nslookup, IP acquisition from domain, domain acquisition from IP.

It can be processed using socket and dnspython.

socket doc：https://docs.python.org/ja/3/library/socket.html

Get IP from domain

import socket

print(socket.gethostbyname("google.com"))

172.217.161.78

Get IP address information from domain

import socket

print(socket.getaddrinfo("yahoo.co.jp", 443))

[(<AddressFamily.AF_INET: 2>, 0, 0, '', ('182.22.59.229', 443)), (<AddressFamily.AF_INET: 2>, 0, 0, '', ('183.79.135.206', 443))]

Get FQDN from IP

import socket

print(socket.getfqdn("182.22.59.229"))

f1.top.vip.ssk.yahoo.co.jp

etc.

dnspython doc: http://www.dnspython.org/docs/1.16.0/

Installation

pip install dnspython

nslookup

nslookup command

nslookup yahoo.co.jp

Name: yahoo.co.jp Addresses: 182.22.59.229 183.79.135.206

Get the same result as the nslookup command in dnspython

import dns.resolver

print(dns.resolver.query("yahoo.co.jp", "A").response.answer[0])

yahoo.co.jp. 0 IN A 182.22.59.229 yahoo.co.jp. 0 IN A 183.79.135.206

Such.

that's all

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