FreeBSD port of relayd and relayctl
relayd is a daemon to relay and dynamically redirect incoming connections to a target host. Its main purposes are to run as a load-balancer, application layer gateway, or transparent proxy. The daemon is able to monitor groups of hosts for availability, which is determined by checking for a specific service common to a host group. When availability is con- firmed, Layer 3 and/or layer 7 forwarding services are set up by relayd.
Layer 3 redirection happens at the packet level; to configure it, relayd communicates with pf(4).
The relayctl program controls the relayd(8) daemon.
The following relayd functionality is not (yet) implemented in FreeBSD:
- carp demote
- modifying routing tables
- snmp traps