Describes the cause and action for error messages.
Error Message(English)：
failed to connect to github.com port 443
GitでProxyの設定を行ってエラー回避する方法 | gitの使い方講座
https://git-manual.net/git-proxy-error/
Improve ease of configuring Git to work with corporate proxy - GitHub
https://github.com/desktop/desktop/issues/2789
Failed to connect to github 443 - Stack Overflow
https://stackoverflow.com/questions/29333319/failed-to-connect-to-github-443
Unable to git clone , Failed to connect to github.com port 443 ...
https://stackoverflow.com/questions/33601366/unable-to-git-clone-failed-to-connect-to-github-com-por・・・
Unable to git clone a repo due to port 443 time ou... - GitHub ...
https://github.community/t5/How-to-use-Git-and-GitHub/Unable-to-git-clone-a-repo-due-to-port-443-tim・・・
Failed to connect to github.com port 443: Timed out | blog ...
https://blog.bjornhouben.com/tag/failed-to-connect-to-github-com-port-443-timed-out/
Failed to connect to github.com port 443: Timed out [English ...
https://blog.victorsilva.com.uy/failed-to-connect-to-github/
Getting Started with Git and GitHub - Git - Codecademy Forums
https://discuss.codecademy.com/t/getting-started-with-git-and-github/251527
Repository Import from URL fails if Gitlab is hosted behind a proxy ...
https://gitlab.com/gitlab-org/gitlab-ce/issues/51517