Local network access
There are two local networks in play once you are connected, and it is worth being precise about which one a setting affects.
Your home network — the one your vploq sits on. Reaching it is the entire point of the product, and it works by default.
The network you are physically on right now — a hotel Wi-Fi, an office LAN. By default, while the tunnel is up, devices on that network are not reachable.
The setting
Preferences → Local network access controls the second one. Turn it on if you need to reach a printer in the room you are sitting in while staying connected to your home network.
Changes apply after you reconnect. Toggle it, then disconnect and connect again.
Why it is off by default
The network you are on is not one you control. An open café network can see what your device exposes, and leaving the local path open there is a meaningfully larger surface than leaving it closed. Your home network stays reachable either way, so the default costs you nothing in normal use.
On iOS and macOS
The operating system asks separately for permission to talk to devices on the local network. If you turned the setting on and still cannot reach anything, check that the permission was granted — the app cannot grant it for you.