.TH relay-ctrl-udp 8 .SH NAME relay-ctrl-udp \- Receive relay-ctrl notifications via UDP .SH SYNOPSIS .B relay-ctrl-udp .SH DESCRIPTION .B relay-ctrl-udp receives notifications of IPs that should be allowed to relay via UDP on port .I $RELAY_CTRL_PORT (defaults to 811), and records them in the directory specified by either .I $RELAY_CTRL_DIR_FD or .IR $RELAY_CTRL_DIR . The sender address of all invalid IPs strings are logged to standard error. .SH SEE ALSO relay-ctrl-send(8), relay-ctrl-check(8) .SH NOTES This program does no source address verification. Use a firewall to filter unwanted transmissions.