A VPN handshake that keeps failing may not be a software problem—it could be a...

https://www.blaze-bookmarks.win/strong-cybersecurity-starts-with-the-cables-ports-and-switches-people-rarely

A VPN handshake that keeps failing may not be a software problem—it could be a damaged patch lead. This article shows how cabling, switches and basic setup mistakes can create real security risks.