Proxy Error Meaning, Common Codes and Fixes
A proxy error can come from your proxy, the website behind it or your own browser. See which one sent yours and how to fix a 407, 403, 502 or other code.
Most common proxy errors
- 407
Proxy Authentication Required
The proxy expected credentials or a whitelisted IP and got neither in a form it accepts.
How to fix it - 403
Forbidden
The site or its firewall refused a request it understood, and a VPN or proxy IP can be the reason.
How to fix it - ERR_PROXY_CONNECTION_FAILED
There is something wrong with the proxy server
Chrome could not resolve or connect to the proxy it was set to use.
How to fix it
Errors by type
Proxy and connection errors
- 407
Proxy Authentication Required
How to fix it - Timeout
Proxy timeout
How to fix it - ERR_PROXY_CONNECTION_FAILED
There is something wrong with the proxy server
How to fix it - Firefox
The proxy server is refusing connections
How to fix it - ERR_TUNNEL_CONNECTION_FAILED
A tunnel connection through the proxy could not be established
How to fix it - ERR_SOCKS_CONNECTION_FAILED
The SOCKS proxy connection failed
How to fix it
- 407
Website and server errors
- 502
Bad Gateway
How to fix it - 503
Service Unavailable
How to fix it - 499
Client Closed Request
How to fix it - 405
Method Not Allowed
How to fix it - 520
Web server is returning an unknown error
How to fix it - 521
Web server is down
How to fix it - 522
Connection timed out
How to fix it - 1003
Direct IP access not allowed
How to fix it
- 502
Website blocks
- 403
Forbidden
How to fix it - 429
Too Many Requests
How to fix it - 1015
You are being rate limited
How to fix it - 1020
Access denied
How to fix it - 1005
Access denied: ASN banned
How to fix it - IP ban
Your IP address has been banned
How to fix it
- 403