# WHATPORT(2608)

## NAME

port 2608 — FRRouting isisd vty — The IS-IS daemon's command line on an FRR router.

Protocol: TCP  
IANA: wag-service

## DESCRIPTION

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

**Do not expose.** Same problem as every FRR vty port: cleartext telnet into a routing daemon's configuration — keep it on loopback.

## CHECK

```sh
nc -v -w 3 TARGET 2608
```

## SEE ALSO

- source — [FRRouting — lib/libfrr.h (ISISD_VTY_PORT 2608)](https://github.com/FRRouting/frr/blob/master/lib/libfrr.h) (github.com)
- docs — [FRRouting docs — isisd](https://docs.frrouting.org/en/latest/isisd.html) (docs.frrouting.org)
- iana — [IANA Service Name and Transport Protocol Port Number Registry — 2608 (wag-service)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=2608) (iana.org)

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HTML: <https://whatport.net/2608/> · JSON: <https://whatport.net/2608.json> · full dataset: <https://whatport.net/ports.json>