I have an optimum online cable router -> 1TB Time Capsule with an ethernet connected PC and then multiple connected mac/apple devices. I randomly get yellow lighted with two errors: NO DNS SERVERS DOUBLE NAT I have read that this MAY have had something to do with recent firmware updates, however I have only had this installed with most recent firmware. I AM USING THIS IN NEW YORK, UNITED STATES. Also want to note I purchased this as a refurbished product from Apple and started having the problem in under a month. Any ideas?