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 real residential IPs in 180+ countries and regions, with granular targeting down to city or ISP level, ideal for global operations and geo-testing.
- Unlimited Traffic & Long Connection Support – Unlimited bandwidth with stable long connections, perfect for long-running tasks without disconnection.
- Flexible IP Rotation & Session Control – Supports static IPs and rotating IPs, with customizable rotation intervals (e.g., every 1–60 minutes) for enhanced security.
- Competitive Pricing – Cost-effective plans with per-IP or traffic-based billing, including non-expiring data packages.
- High Anonymity & Reliability – IPs from real residential sources, hard to detect as proxies, suitable for sensitive and anti-fraud scenarios.
- Multi-Protocol & Platform Compatibility – Supports HTTP, HTTPS, SOCKS5; works on Windows, macOS, Linux; easily integrates with web scraping tools and multi-account browsers.
- Multiple IP Acquisition Methods & 24/7 Support – IPs can be obtained via web, API, or client applications, backed by responsive 24/7 customer support.
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 provides a stable, efficient, secure, and cost-effective proxy solution for businesses requiring high concurrency, high anonymity, and broad geographic coverage. For assistance, contact CLiproxy’s online support: https://t.me/cliproxy
Benjamin Carter
