Re: Fwd: Request for Assignment (http-proxy-status)

Hi Mark,

On Fri, Sep 26, 2025 at 09:53:51AM +1000, Mark Nottingham wrote:
> Hi everyone,
> 
> With my HTTP Proxy Error Types Expert hat on, we've received the following
> request, and per the RFC I'm asking for any community feedback.
> 
> Thoughts?

It's unclear to me what this corresponds to. Is this someone asking what
status code to use for a protocol extension, in their code, someone
disagreeing with established status codes, or anything else ?

FWIW in haproxy when we reject accesses (based on ACL or anything else),
we also use 403. I don't know if this helps.

> > Begin forwarded message:
> > 
> > 
> > Type of Assignment:
> > Name: origin_acl
> > Description: The intermediary rejected the HTTP request based on ACL rules which prohibit access to the requested next hop.
> > Extra Parameters: None
> > Recommended HTTP Status Code: 403
> > Response Only Generated by Intermediaries: true
> > 
> > Registry:
> > https://www.iana.org/assignments/http-proxy-status/http-proxy-status.xhtml#http-proxy-error-types
> > 
> > Description:
> > We're running a MASQUE/CONNECT/ProxyB server for (multi party) private relay style architectures and would like to signal to clients that a proxy attempt was rejected due to origin ACL rules.
> > 
> > Additional Info:
> > https://www.rfc-editor.org/rfc/rfc9209.html#name-proxy-error-types
> 
> --
> Mark Nottingham   https://www.mnot.net/

Regards,
Willy

Received on Friday, 26 September 2025 03:31:35 UTC