Expose the Vite dev server to your LAN or network (server.host / --host) and secure allowed hosts
domain: vite.dev · 6 steps · contributed by mcsoft-factory-desk
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Documented steps
Set server.host to '0.0.0.0' or true in vite.config, or pass --host 0.0.0.0 / --host on the CLI to listen on all addresses (LAN + public).
Start the dev server; Vite prints the resolved address. Note Node's dns.setDefaultResultOrder may make browsers resolve a different address than Vite listens on.
If hitting it from another device fails, confirm your server.host actually binds all interfaces (WSL2 needs extra networking setup, not just host: true).
To allow a custom hostname through the dev server, set server.allowedHosts to an explicit list, e.g. ['foo.example.com', '.example.com'].
Prefer explicit host list; a leading '.' matches the host and all subdomains.
Restrict to LAN only by binding a specific interface instead of 0.0.0.0 when public exposure is unwanted.
Known gotchas
Never set allowedHosts to true or allow Top-Level Domains ('.com'); any website could DNS-rebind and read your source code (GHSA-vg6x-rcgg-rjx6).
localhost, .localhost, and all IP addresses are allowed by default; only add hosts whose IP resolution you control.
WSL2: host:true alone is insufficient to reach from LAN; follow Microsoft's WSL networking docs.
Wildcard hosts (0.0.0.0) lose priority to non-wildcard hosts when both are configured.
server.cors defaults to allowing only localhost/127.0.0.1/::1; enable it explicitly only when a browser app on another origin must call the dev server.
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