Introduction When troubleshooting network connectivity, ICMP (ping) only tells you half the story. Ping verifies Layer 3 routing, but it cannot tell you if a specific TCP port is open, closed, or being actively blocked by a stateful firewall. Instead of relying on external tools or workstations, you can use a Cisco router’s native Telnet […]

Scenario A customer wanted to run Emby Media Server on ports: When these ports were configured inside of the config (/var/lib/emby/config/system.xml) the service would not startup. This was because Emby Media Server runs as its own user (emby) and short ports like 80 and 443 are reserved for users with escalated privileges. Solution Instead of […]