corporate firewalls interfere with downloads

Problem

Rustup toolchain install fails on WIN10. Log:

> rustup toolchain install nightly
info: syncing channel updates for 'nightly-x86_64-pc-windows-gnu'
750.8 KiB / 750.8 KiB (100 %) 416.0 KiB/s in  1s ETA:  0s
info: latest update on 2023-01-05, rust version 1.68.0-nightly (659e169d3 2023-01-04)
info: downloading component 'cargo'
info: downloading component 'clippy'
info: downloading component 'rust-docs'
info: retrying download for 'https://static.rust-lang.org/dist/2023-01-05/rust-docs-nightly-x86_64-pc-windows-gnu.tar.xz'
info: retrying download for 'https://static.rust-lang.org/dist/2023-01-05/rust-docs-nightly-x86_64-pc-windows-gnu.tar.xz'
info: retrying download for 'https://static.rust-lang.org/dist/2023-01-05/rust-docs-nightly-x86_64-pc-windows-gnu.tar.xz'
info: retrying download for 'https://static.rust-lang.org/dist/2023-01-05/rust-docs-nightly-x86_64-pc-windows-gnu.tar.xz'
error: component download failed for rust-docs-x86_64-pc-windows-gnu: could not download file from 'https://static.rust-lang.org/dist/2023-01-05/rust-docs-nightly-x86_64-pc-windows-gnu.tar.xz' to 'C:\XXXX\rustup\.rustup\downloads\d58a2e4217d7d9feca7423179e3090ff12bc5ca7423179e3090ff12bc52ec2fae8f216e32acb841f286b4.partial'


> rustup toolchain install stable
info: syncing channel updates for 'stable-x86_64-pc-windows-gnu'
info: latest update on 2022-12-15, rust version 1.66.0 (69f9c33d7 2022-12-12)
info: downloading component 'cargo'
info: downloading component 'clippy'
info: downloading component 'rust-docs'
info: retrying download for 'https://static.rust-lang.org/dist/2022-12-15/rust-docs-1.66.0-x86_64-pc-windows-gnu.tar.xz'
info: retrying download for 'https://static.rust-lang.org/dist/2022-12-15/rust-docs-1.66.0-x86_64-pc-windows-gnu.tar.xz'
info: retrying download for 'https://static.rust-lang.org/dist/2022-12-15/rust-docs-1.66.0-x86_64-pc-windows-gnu.tar.xz'
info: retrying download for 'https://static.rust-lang.org/dist/2022-12-15/rust-docs-1.66.0-x86_64-pc-windows-gnu.tar.xz'
error: component download failed for rust-docs-x86_64-pc-windows-gnu: could not download file from 'https://static.rust-lang.org/dist/2022-12-15/rust-docs-1.66.0-x86_64-pc-windows-gnu.tar.xz' to 'C:\XXXX\rustup\.rustup\downloads\093257159ba394c5306474373475d0a78031d7691e6c0fb1834503eb4790ceae.partial'

Steps

1. execute rustup toolchain install stable

Possible Solution(s)

No response

Notes

No response

Rustup version

rustup 1.25.1 (bb60b1e89 2022-07-12)

Installed toolchains

None

NOTE:

On the same machine, rustup 1.25.1 works in wsl.

Start by reproducing rustup toolchain install stable on Windows 10 behind the reported corporate firewall, then compare its download behavior with WSL. The payload names no source files or tests, so trace the toolchain component download path from this command and identify how the failure should be handled; done means the Windows download issue has a confirmed fix or documented resolution.