return loopback address in case of failure to resolve ip address

Author: sylphrena0

backend/lib/ddns_resolver/ddns_resolver.js

@@ -34,7 +34,7 @@ const ddnsResolver = {
 			.catch((/*error*/) => {
 				// return input address in case of failure
 				logger.error(`Failed to resolve IP for ${host}`);
-				return domainName;
+				return '127.0.0.1'; // in case of failure, return the loopback address
 			});
 	},