WP Domain IP Resolver

A WordPress plugin to customize domain-to-IP mappings for HTTP requests - perfect for testing, development, and load balancing.

Description

Domain IP Resolver allows you to override DNS resolution for specific domains and ports within WordPress, forcing them to resolve to custom IP addresses. This is particularly useful for:

• Development and Testing: Test against staging servers without changing DNS settings
• Load Balancing: Route traffic to specific servers based on domain/port combinations
• Local Development: Point production domains to local development environments
• CDN Testing: Test different CDN endpoints without DNS changes
• Debugging: Troubleshoot connectivity issues by bypassing DNS resolution

Features

• ✅ Easy-to-use Interface: Simple admin panel with dynamic table management
• ✅ Domain:Port Mapping: Specify exact port mappings for precise control
• ✅ IPv4 & IPv6 Support: Works with both IPv4 and IPv6 addresses
• ✅ Duplicate Prevention: Built-in validation prevents duplicate mappings
• ✅ Real-time Validation: Client-side and server-side validation
• ✅ JSON Storage: Efficient data storage and retrieval
• ✅ Translation Ready: Fully localized with English translations

Installation

1. Download the plugin files
2. Upload to your WordPress /wp-content/plugins/ directory
3. Activate the plugin through the 'Plugins' menu in WordPress
4. Navigate to Settings > Domain IP Resolver to configure

Usage

Basic Configuration

1. Go to Settings > Domain IP Resolver in your WordPress admin
2. Click Add Row to create a new mapping
3. Enter the domain name (e.g., api.example.com)
4. Specify the port (e.g., 443 for HTTPS, 80 for HTTP)
5. Enter the target IP address (e.g., 192.168.1.100)
6. Click Save Changes

Example Configurations

Redirect API calls to staging server:

• Domain: api.mysite.com
• Port: 443
• IP: 192.168.1.50

Local development setup:

• Domain: mysite.com
• Port: 80
• IP: 127.0.0.1

CDN testing:

• Domain: cdn.mysite.com
• Port: 443
• IP: 203.0.113.10

Technical Details

How It Works

The plugin uses WordPress's http_api_curl filter to intercept HTTP requests and applies custom DNS resolution using cURL's CURLOPT_RESOLVE option. This method:

• Only affects WordPress HTTP requests (wp_remote_get, wp_remote_post, etc.)
• Doesn't modify system-wide DNS settings
• Works with SSL/TLS connections
• Supports both IPv4 and IPv6 addresses

Validation

The plugin includes comprehensive validation:

• Domain validation: Ensures valid domain format
• Port validation: Checks port range (1-65535)
• IP validation: Validates IPv4 and IPv6 addresses
• Duplicate prevention: Prevents duplicate domain:port combinations

Data Storage

Mappings are stored as JSON in the WordPress options table for optimal performance and easy backup/restore capabilities.

Requirements

• WordPress 4.7 or higher
• PHP 7.0 or higher
• cURL extension enabled

Frequently Asked Questions

Q: Does this affect all web traffic on my server? A: No, this only affects HTTP requests made by WordPress itself using wp_remote_get, wp_remote_post, and similar functions.

Q: Can I use this for external API calls? A: Yes, this is perfect for redirecting API calls to staging servers or alternate endpoints.

Q: Does it work with SSL/HTTPS? A: Yes, the plugin works with both HTTP and HTTPS requests.

Q: Can I backup my mappings? A: Yes, the data is stored in WordPress options and will be included in standard WordPress backups.

Support

For support, feature requests, or bug reports, please contact the plugin author or submit an issue through the appropriate channels.

License

This plugin is licensed under the GPL v2 or later.

Author

dueclic
Website: https://www.dueclic.com

Version 1.0.0 - Built with WordPress best practices and security in mind.