What Does HTTP 406 Mean?
An HTTP 406 “Not Acceptable” error is a client error status code indicating that the server cannot generate a response that meets the requirements specified in the client’s request headers (especially the Accept header). These headers tell the server which content types (e.g., application/json, text/html), languages, or character sets the client can handle.
Common Causes of a 406 Error
- Content Type Mismatch – The most common cause: the server cannot provide the requested resource in a format allowed by the client’s Accept header.
- Incorrect Accept Headers – The client may send incorrect or unsupported values in the Accept headers.
- Server Configuration Issues – The server may be misconfigured, unable to deliver content in alternative formats, or unable to handle content negotiation properly.
- Mod_Security or Firewall Rules – Security modules like
mod_security on Apache servers may trigger a 406 error if a request action violates a predefined rule.
- CMS or Application Issues – Problems in content management systems (e.g., WordPress) or with plugins, themes, or third-party extensions can also cause this error.
Troubleshooting and Solutions
- Check Client-Side Accept Headers – Ensure the Accept headers sent by the client are correct and reflect supported content types.
- Check Server-Side Content Negotiation – Verify that the server is configured to serve the required content types and has content negotiation enabled.
- Adjust Server Configuration – If applicable, modify server settings (e.g., Apache, Nginx) to allow requested content types or disable restrictive rules.
- Inspect Application Logs – Check server or application logs for detailed error information.
- Disable or Configure Security Modules – Temporarily disable security modules (e.g.,
mod_security) for testing or adjust rules to avoid false positives.
- Troubleshoot CMS/Application – For CMS-based setups, check recently installed plugins, themes, or code changes that might interfere with content delivery.
CLiproxy: Introduction and Advantages
What is CLiproxy?
CLiproxy is a trusted proxy service platform offering real residential, mobile, and ISP IP addresses worldwide. It supports SOCKS5, HTTP, and HTTPS protocols and is suitable for automation, privacy protection, web scraping, and more.
Key Advantages of CLiproxy
- Massive Global IP Pool
Over 100 million native IPs, with granular targeting down to city and ISP level—ideal for global operations and regional testing.
- Unlimited Bandwidth & Long Connection Support
Provides full traffic usage with no bandwidth limits, supporting long sessions without disconnections—perfect for long-running tasks.
- Flexible IP Rotation & Session Control
Offers both static IPs and rotating IPs, with customizable rotation intervals (e.g., every 1–60 minutes), enhancing security and reducing risk.
- Competitive Pricing
Highly cost-effective, supporting both IP-based and traffic-based billing, with non-expiring data packages available.
- High & Reliability
All IPs offering stable operation and strong resistance to native IP detection—ideal for sensitive use cases.
- Rich Protocol & Platform Compatibility
Supports HTTP, HTTPS, SOCKS5 protocols; works seamlessly on Windows, macOS, and Linux; easily integrates with crawlers, multi-account browsers, and automation tools.
- Multiple Access Methods & 24/7 Customer Support
Provides IP access via Web, API, and client tools, with round-the-clock customer service to assist with deployment and troubleshooting.
Common Use Cases
- Data scraping / Web crawling
- Ad & content geo-testing
- Cross-border e-commerce / Bulk social media account management
- SEO / SERP analysis
- Market research / Price monitoring
- Automation testing & multi-account management
CLiproxy offers a stable, efficient, secure, and cost-effective native IP solution, tailored for businesses requiring high concurrency, and broad geographic coverage.
👉 If you need help, contact CLiproxy’s online support here: https://t.me/cliproxy
Benjamin Carter
