Visual Studio无法创建azurewebsites:4020安全连接，认证失败致网站无法登录求助

Hey there, let's fix this authentication failure issue between Visual Studio and azurewebsites.net:4020 together. I’ve helped folks work through similar problems before, so here are some practical, tested solutions you can try right now:

• 清理Visual Studio的缓存与凭据
  First, close Visual Studio completely. Open Windows Credential Manager (Control Panel → User Accounts → Credential Manager), then delete all credentials related to Azure and Visual Studio (both "Windows Credentials" and "Generic Credentials"). Restart VS afterward and re-login to your Azure account—this clears out any expired or corrupted credentials that might be causing conflicts.

• 更新Visual Studio到最新版本
  Outdated VS versions often have compatibility issues with Azure services. Go to Help → Check for Updates in Visual Studio, install all available updates, then restart the application. This ensures you’re running the most stable, compatible build.

• 验证Azure账户权限与订阅状态
  Log into the Azure portal and double-check two things: your account has the right permissions (like Contributor or Owner) for the target App Service, and your Azure subscription is active (not expired or suspended). Missing permissions or inactive subscriptions are common culprits here.

• 重置App Service的发布凭据
  If this issue pops up when trying to publish, head to your App Service in the Azure portal. Go to Deployment Center → FTP Credentials and click "Reset Publish Credentials". Then, in Visual Studio, reconfigure your publish profile with the new credentials and try connecting again.

• 检查防火墙与代理设置
  Make sure your local firewall isn’t blocking Visual Studio from accessing port 4020. If you use a proxy server, configure it correctly in VS: go to Tools → Options → Environment → Web Proxy, either check "Use system proxy settings" or enter your proxy details manually. Restart VS after making changes.

• 修复或重新安装Visual Studio
  If none of the above works, some VS components might be corrupted. Open the Visual Studio Installer, select your installation, click "Modify → Repair". If repair doesn’t help, uninstall VS completely and reinstall the latest version.

Give these steps a shot one at a time—chances are one of them will resolve the authentication error and let you log in successfully. If you need more specifics on any step, feel free to ask!

内容的提问来源于stack exchange，提问作者Prem Murmu