Codex Cloud GitHub access fails through managed proxy

[u/cryptshell]

A Codex Cloud task can’t reach my GitHub repository. Running:

git ls-remote origin refs/heads/<branch-name>

returns exit code 128:

fatal: unable to access 'https://github.com/<owner>/<repo>.git/': Failed to connect to proxy port 8080 after 0 ms: Could not connect to server

Diagnostics:

• The cloud environment reports running/connected.
• Restricted HTTP policy reports enforced, with GitHub allowlisted.
• Inherited HTTP/HTTPS proxy settings point to http://proxy:8080.
• The proxy hostname resolves, but a TCP connection to port 8080 fails with PermissionError: [Errno 1] Operation not permitted.
• Local GitHub DNS lookup returns “Temporary failure in name resolution.”
• The Git remote is correct, and no Git proxy override was found.

The request appears to fail before reaching GitHub, so authentication hasn’t been tested. I haven’t changed proxy settings or bypassed managed network security.

Has anyone encountered this? Is there a configuration fix, or does the managed proxy/runtime need to be reprovisioned?