Implementation of a caching DNS Server

General description

This is an implementation of a UDP caching DNS server written in Python3. All written operations are correspond to RFC 1035

Requirements

• Python 3.*
• IPy

Usage

To run a server use the next command:

$ python3 dns.py [-h] [-p P] [-f F]

List of arguments:

Argument	Description
-h, --help	Show this help message and exit
-p P	Port for running a server
-f F	Address of a forwarder written in format IP:Port. Port can be omitted

For example, you run a server on 9090 port. Then you can make queries to it by typing the next command (get A records from google.com):

dig +notcp @127.0.0.1 -p 9090 google.com A

Example of using

$ python3 dns.py -p 9090 -f 8.8.8.8
[+] Server is configurated
[+] Server is running on 9090 port

2017-05-09 20:14:50 -- [*] 127.0.0.1 A google.com. forwader

2017-05-09 20:14:51 -- [*] 127.0.0.1 A google.com. cache

2017-05-09 20:14:52 -- [*] 127.0.0.1 A google.com. cache

2017-05-09 20:14:52 -- [*] 127.0.0.1 A google.com. cache

2017-05-09 20:14:52 -- [*] 127.0.0.1 A google.com. cache

2017-05-09 20:14:53 -- [*] 127.0.0.1 A google.com. cache

2017-05-09 20:14:53 -- [*] 127.0.0.1 A google.com. cache

2017-05-09 20:14:54 -- [*] 127.0.0.1 A google.com. cache

2017-05-09 20:15:02 -- [*] 127.0.0.1 A ya.ru. forwader

2017-05-09 20:15:03 -- [*] 127.0.0.1 A ya.ru. cache

2017-05-09 20:15:05 -- [*] 127.0.0.1 NS ya.ru. forwader

2017-05-09 20:15:06 -- [*] 127.0.0.1 NS ya.ru. cache