broadcast heartbeat once per second?

[Ricardo Kleemann <ricardo@xxxxxxxxxxx>]

Hi guys,

Something else I'm seeing... I have heartbeat running on my firewall, and
I haven't yet properly configured it to allow the heartbeat udp packets on
port 695. But it doesn't make sense to me to see this:

Aug 15 23:39:33 output DENY eth2 PROTO=17 192.168.1.1:50000
192.168.255.255:694 L=135 S=0x00 I=2192 F=0x0000 T=64 (#4)
Aug 15 23:39:34 output DENY eth2 PROTO=17 192.168.1.1:50000
192.168.255.255:694 L=135 S=0x00 I=2224 F=0x0000 T=64 (#4)

Once per second I see a broadcast (192.168.255.255) on port 694.

Why is it being broadcast like that?