diff --git a/packages/server/src/cli.ts b/packages/server/src/cli.ts
index 790106285523..82241976be7c 100644
--- a/packages/server/src/cli.ts
+++ b/packages/server/src/cli.ts
@@ -235,6 +235,9 @@ const bold = (text: string | number): string | number => {
 		} : undefined,
 	});
 
+	if (options.noAuth && options.host === "0.0.0.0" || options.allowHttp && options.host === "0.0.0.0") {
+		logger.warn("0.0.0.0 is accessible to every device on the network you're connected to. Make sure you set up authentication to prevent unauthorized access.");
+	}
 	logger.info("Starting webserver...", field("host", options.host), field("port", options.port));
 	app.server.listen(options.port, options.host);
 	let clientId = 1;