# port > Ports that participate in the RoMON network. ----------- ## tool/romon/port **Type:** Directory Ports that participate in the [RoMON network](../../../management-tools/romon#choose-ports). default disabled dynamic Interface that participates in RoMON; either a single interface or the built-in wildcard `all`. Master interfaces such as bridges are not accepted — name the physical ports. The preconfigured `all` entry cannot be added a second time, removed, enabled or disabled; only its `cost`, `forbid` and `secrets` can be changed. Whether the matched interface is allowed or forbidden to participate in the RoMON network. The port's cost. All specific port entries have higher priority than the wildcard entry with `interface=all`. List of individual port secrets used for RoMON message hashing.