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[JENKINS-72343] "Validate Proxy" button should accept 2xx and 3xx responses in HTTP Proxy Configuration #18817
Description
In "Manage > Plugins > Advanced settings > HTTP Proxy Configuration" there is a "Validate Proxy" button.
If you try it with an URL returning a valid status code like a 301 redirection, an error is returned even if the URL correctly responded.
Example with `https://google.com`, redirecting to `https://www.google.com`:
Originally reported by 
hlemeur, imported from: "Validate Proxy" button should accept 2xx and 3xx responses in HTTP Proxy Configuration
- assignee: hlemeur
- status: Closed
- priority: Trivial
- component(s): core
- label(s): jenkins, proxy
- resolution: Fixed
- resolved: 2023-12-05T13:35:04+00:00
- votes: 0
- watchers: 1
- imported: 2025-11-24
Raw content of original issue
In "Manage > Plugins > Advanced settings > HTTP Proxy Configuration" there is a "Validate Proxy" button.
If you try it with an URL returning a valid status code like a 301 redirection, an error is returned even if the URL correctly responded.
Example with `https://google.com`, redirecting to `https://www.google.com`:
Activity