{
  "port": 2608,
  "protocol": "tcp",
  "service": "FRRouting isisd vty",
  "oneLiner": "The IS-IS daemon's command line on an FRR router.",
  "whatItIs": "FRRouting defines 2608 as ISISD_VTY_PORT, the telnet-style CLI for isisd, in the same series as ospfd (2604) and bgpd (2605). A listener here means a box is running IS-IS under FRR, which in practice means a data-center fabric or a service-provider core built on Linux routing. IANA registers 2608 to \"Wag Service\", an assignment you will not meet in the wild.",
  "exposure": {
    "verdict": "never",
    "note": "Same problem as every FRR vty port: cleartext telnet into a routing daemon's configuration — keep it on loopback."
  },
  "checkCommand": "nc -v -w 3 TARGET 2608",
  "links": [
    {
      "title": "FRRouting — lib/libfrr.h (ISISD_VTY_PORT 2608)",
      "url": "https://github.com/FRRouting/frr/blob/master/lib/libfrr.h",
      "kind": "github"
    },
    {
      "title": "FRRouting docs — isisd",
      "url": "https://docs.frrouting.org/en/latest/isisd.html",
      "kind": "official-docs"
    },
    {
      "title": "IANA Service Name and Transport Protocol Port Number Registry — 2608 (wag-service)",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=2608",
      "kind": "iana"
    }
  ],
  "ianaName": "wag-service"
}