463 Too Many IPs in X-Forwarded-For

463

Too Many IPs in X-Forwarded-For

Example HTTP Response

HTTP Response

HTTP/1.1 463 X-Forwarded-For Header with More Than 30 IP Addresses
Content-Type: text/html
Connection: close

<html><body>Too many IP addresses in X-Forwarded-For header</body></html>

Common Causes

Request passed through more than 30 proxy servers
Malicious attempt to overflow the X-Forwarded-For header
Misconfigured proxy chain
Proxy loop causing IP addresses to accumulate
Attack vector attempting header manipulation
Multiple CDN/proxy layers without proper header management
Nested load balancers without header cleanup

Technical Details

What does this mean?

Your forwarding chain is way too long! It's like a game of telephone that went through 30+ people - we're cutting you off before this gets ridiculous. How many proxies are you going through?!

Technical Definition

The X-Forwarded-For header contains more than 30 IP addresses, exceeding AWS ELB's limit.

Code Snippets

Ready-to-use code for returning this HTTP status in your application:

Node.js

// Express.js
app.get('/example', (req, res) => {
  res.status(463).json({
    error: 'Too Many IPs in X-Forwarded-For',
    message: 'Your error message here'
  });
});

// Native HTTP
const http = require('http');

http.createServer((req, res) => {
  res.writeHead(463, { 'Content-Type': 'application/json' });
  res.end(JSON.stringify({
    error: 'Too Many IPs in X-Forwarded-For',
    message: 'Your error message here'
  }));
}).listen(3000);

Related Status Codes

🤨400Bad Request 📦413Payload Too Large 📋431Request Header Fields Too Large

463 Too Many IPs in X-Forwarded-For FAQ

What causes a 463 Too Many IPs in X-Forwarded-For error?

Request passed through more than 30 proxy servers. Malicious attempt to overflow the X-Forwarded-For header. Misconfigured proxy chain. Proxy loop causing IP addresses to accumulate. Attack vector attempting header manipulation. Multiple CDN/proxy layers without proper header management. Nested load balancers without header cleanup.

// Express.js app.get('/example', (req, res) => { res.status(463).json({ error: 'Too Many IPs in X-Forwarded-For', message: 'Your error message here' }); }); // Native HTTP const http = require('http'); http.createServer((req, res) => { res.writeHead(463, { 'Content-Type': 'application/json' }); res.end(JSON.stringify({ error: 'Too Many IPs in X-Forwarded-For', message: 'Your error message here' })); }).listen(3000);

463 Too Many IPs in X-Forwarded-For FAQ

What causes a 463 Too Many IPs in X-Forwarded-For error?