Codex IDE extension fails with 403 Forbidden over Remote SSH on Linux etc.

What version of the IDE extension are you using?

Version 26.5513.21555

What subscription do you have?

ChatGPT Pro

Which IDE are you using?

VS Code / Positron with Remote SSH

What platform is your computer?

Local: Windows 111 x64, Remote: Linux server via SSH

What issue are you seeing?

When connecting to a Linux server via SSH, the Codex CLI （Version 26.5513.21555）in VS Code, Positron, and similar IDEs keeps showing errors. Reconnecting... 2/5 Reconnecting... 3/5 Reconnecting... 4/5 Reconnecting... 5/5 Reconnecting... 1/5 Reconnecting... 2/5 Reconnecting... 3/5 Reconnecting... 4/5 Reconnecting... 5/5 unexpected status 403 Forbidden: <html> <head> <meta name="viewport" content="width=device-width, initial-scale=1" /> <style global>body{font-family:Arial,Helvetica,sans-serif}.container{align-items:center;display:flex;flex-direction:column;height:100%;justify-content:center;width:100%}@keyframes enlarge-appear{0%{opacity:0;transform:scale(75%) rotate(-90deg)}to{opacity:1;transform:scale(100%) rotate(0deg)}}.logo{color:#8e8ea0;padding-bottom:1.5rem}.scale-appear{animation:enlarge-appear .4s ease-out}@media (min-width:768px){.scale-appear{height:48px;width:48px}}.data:empty{display:none}.data{border-radius:5px;color:#8e8ea0;max-width:420px;text-align:center;width:100%}.data ul{list-style:none;padding:0}.blocked-icon{color:#ef4444}.message{align-items:center;display:flex;font-size:1.5rem;gap:1rem;justify-content:center}.explanation{font-size:.9rem;line-height:1.5;max-width:420px;opacity:50%;text-align:center;width:100%}.explanation a{color:#000}@media (prefers-color-scheme:dark){body{background-color:#343541;c..., url: https://chatgpt.com/backend-api/codex/responses, cf-ray: 9ff5d69b08c128ee-HKG ##Network:
Using a proxy with a Japan exit node.

Additional notes:

• The Codex desktop app works normally under the same network environment.
• Running Codex directly in a normal Linux terminal also works normally.
• The issue only occurs when using the Codex IDE extension inside VS Code / Positron over Remote SSH.

What steps can reproduce the bug?

<img width="2048" height="1419" alt="Image" src="https://github.com/user-attachments/assets/3c90229c-5677-4f52-90d8-ca6cd5eaf759" />

What is the expected behavior?

_No response_

Additional information

_No response_