HTTP 305 Use Proxy was defined to indicate that the resource must be accessed through a proxy specified in the Location header. This status code has been deprecated due to security concerns — it could be exploited to redirect traffic through malicious proxies. Modern browsers do not honor it.
Status
305 Use Proxy (Deprecated)Example
GET /page HTTP/1.1
Host: www.example.com
User-Agent: Mozilla/5.0
Accept: text/htmlHTTP/1.1 305 Use Proxy
Location: http://proxy.example.com:8080
Content-Length: 0How to Troubleshoot
Update server configuration
Replace the 305 response with an appropriate redirect (301, 302, or 307) since 305 is deprecated and ignored by modern browsers.
Configure proxy at the network level
If proxy access is required, configure it via system or browser proxy settings rather than HTTP status codes.
Common Causes
Legacy server configuration
highAn older server or application is returning this deprecated status code.
Related Status Codes
References
| Specification | Section |
|---|---|
| HTTP Semantics | RFC 9110 §15.4.6 (Deprecated) |
Frequently Asked Questions
This reference was compiled from official RFCs, protocol specifications, and hands-on troubleshooting experience. AI tools were used primarily for formatting and organizing the content on the page.