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IFSTATED(8) System Manager's Manual IFSTATED(8)

Interface State daemon

ifstated [
] [
-D macro=value
] [
-f file

The ifstated daemon runs commands in response to network state changes, which it determines by monitoring interface link state or running external tests. For example, it can be used with carp(4) to change running services or to ensure that carp(4) interfaces stay in sync, or with pf(4) to test server or link availability and modify translation or routing rules. The options are as follows:
Define macro to be set to value on the command line. Overrides the definition of macro in the configuration file.
Do not daemonize and log to stdout.
Specify an alternate location, file, for the configuration file.
Print help message.
Ignore initial interface states.
Configtest mode. Check config validity, then exit.
Verbose mode. Use twice to further increase verbosity.
Upon receiving SIGHUP, ifstated reloads the configuration file.

ifstated configuration file.

carp(4), pf(4), ifstated.conf(5)

The ifstated program first appeared in OpenBSD 3.8.
August 8, 2017 OpenBSD-current