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长久以来，VPN 一直是远程访问的默认解决方案，它们解决了网络可达性的实际问题。但实际上，尤其对于小型团队来说，VPN 往往会带来脆弱性。连接中断、路由故障、入职流程繁琐，而且访问更多地与网络位置而非身份相关联。在过去的一年里，我一直在尝试理解“无 VPN”远程访问模型在幕后是如何运作的——不是从营销角度，而是从机制上。它们中的大多数都颠覆了连接模型：不是笔记本电脑访问私有网络，而是服务器上的一个小代理建立到控制平面的出站连接，并通过该连接进行访问。服务器上没有任何东西公开监听。没有打开任何入站端口。身份验证和授权发生在每次会话之前，而不是授予广泛的网络访问权限。我在这里写了一个更长的解释，重点介绍了这个模型是如何工作的，它在哪里有帮助，以及 VPN 在哪里仍然有意义： https://www.lynxtrac.com/how-vpn-free-remote-access-works 欢迎大家分享：您在生产环境中使用过无 VPN 访问模型吗？它们在哪里简化了流程？它们在哪里打破了预期？

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VPNs have been the default answer to remote access for a long time, and they solve a real problem: network reachability.But in practice, especially for small teams, VPNs often introduce fragility. Connections drop, routing breaks, onboarding is awkward, and access is tied more to network location than to identity.Over the last year, I’ve been trying to understand how “VPN-free” remote access models actually work under the hood — not from a marketing perspective, but mechanically. Most of them flip the connection model: instead of a laptop reaching into a private network, a small agent on the server establishes an outbound connection to a control plane, and access is brokered through that.Nothing listens publicly on the server. No inbound ports are opened. Authentication and authorization happen before each session, rather than granting broad network access.I wrote a longer explanation here, focusing on how this model works, where it helps, and where VPNs still make sense:https://www.lynxtrac.com/how-vpn-free-remote-access-worksCurious to hear from others:Have you used VPN-free access models in production?Where did they simplify things?Where did they break expectations?

VPN 畅通无阻的远程访问是如何实现的