Hello, I've taken over a customer's entire network. I need to open a port on their router/firewall, however the previous IT manager didn't leave the username and password. So I'm not sure of exactly what ports are currently open and to where they are routed. Before doing a hard reset to the default settings, is there a way internally to test which ports are open and to where they are routed. This way, after I do the hard reset, I can reopen the previously open ports so the customer doesn't experience any issues. Or if anyone has other ideas, I'd be open for suggestions. Thanks.