Treat port 9998 not as a threat, but as a signal. When you see it, investigate. It may be keeping the lights on—or someone may be trying to turn them off.
Elias’s heart skipped a beat. He knew that acronym. DBC. It stood for Distributed Block Chain , but not the modern crypto kind. This was an old experimental protocol from the dot-com boom, a way to mirror hard drives across the globe before cloud storage existed. It was supposed to be decommissioned a decade ago. Port 9998 was its broadcast channel, the "shout" port where the server announced its existence to any sibling servers listening. tcp port 9998
He decided to be reckless. He opened a raw Telnet client, the digital equivalent of knocking on a stranger's door in a dark alley. Treat port 9998 not as a threat, but as a signal