Enhanced DNS Resolution Script

Overview

This Python script performs DNS resolution for a list of IP addresses or hostnames. It supports both forward and reverse DNS lookups, concurrent processing for improved performance, and various output formats.

Features

• Concurrent processing of DNS lookups
• Support for both forward and reverse DNS lookups
• Custom DNS server specification
• Configurable timeout for lookups
• Batch processing for large input files
• Multiple output formats (CSV, JSON, plain text)
• Progress bar for visual feedback
• Verbose logging option for debugging

Prerequisites

• Python 3.6 or later
• Required Python packages (see requirements.txt)

Installation

1. Clone this repository or download the script.
2. Install the required packages:

pip install -r requirements.txt

Usage

Run the script from the command line with various options:

python dns_resolver.py input_file output_file [options]

Arguments:

• input_file: Path to the input file containing IP addresses or hostnames (one per line)
• output_file: Path to the output file for results

Options:

• --dns-server DNS_SERVER: Specify a custom DNS server for lookups
• --timeout TIMEOUT: Set the timeout for each lookup in seconds (default: 2)
• --batch-size BATCH_SIZE: Number of addresses to process in each batch (default: 100)
• --output-format {csv,json,txt}: Choose the output file format (default: csv)
• --reverse: Perform reverse DNS lookup (hostname to IP)
• --verbose: Enable verbose logging for debugging

Example:

python dns_resolver.py addresses.txt results.json --dns-server 8.8.8.8 --timeout 3 --batch-size 200 --output-format json --reverse --verbose

Input File Format

The input file should contain one IP address or hostname per line. For example:

192.168.1.1
google.com
10.0.0.1
example.org

Output

The script will generate an output file in the specified format (CSV, JSON, or plain text) containing the results of the DNS lookups.

Error Handling

• The script logs errors and continues processing if individual lookups fail.
• Use the --verbose option for detailed logging of errors and debugging information.

Performance

The script uses concurrent processing to improve performance when dealing with a large number of entries. Adjust the --batch-size option to optimize for your system's capabilities.

Contributing

Contributions to improve the script are welcome. Please submit a pull request or open an issue to discuss proposed changes.

License

MIT