Make and model?
Make and model? If software, operating system and version?
Imagine going into an auto parts store and asking about a problem without offering the slightest clue about what you're driving.
Sounds like either the Windoze XP SP2 firewall, Norton Firewall, or ZoneAlarm. The messages are similar. I'm too lazy to decode which one. Could I trouble you to reveal the winning firewall?
You're close, but not quite.
It means that a machine that has already been assigned an IP address by your router has issued a broadcast packet. It can be an ARP (address resolution protoocl) request, DHCP renewal, some kind of discovery protocol, worms looking for something to attack, spyware on192.168.1.3, or some manner of misconfiguration on 192.168.1.3. The station already has an IP address, so it's not a DHCP request.
I like to run my LAN (local area network) essentially as a trusted network, which will allow anything and everything from other computahs and devices on the local LAN. If this is an acceptable mode of operation, I would suggest you say "NO this time only" and then dive into the configuration of your unspecified firewall, and disarm security for the local LAN. The message should then go away by itself.
Whether you want to operate your LAN is this manner is your decision. If you're LAN is inhabited by roaming computahs, such as running an open wireless connection shared with the neighborhood, or you have junior hackers that tend to collect worms, viruses, spyware, etc, this many not be such a great idea. In that case, remove your LAN from trusted status in your firewall configuration, disable "file and print sharing exception" in the XP SP2 firewall, and say "NEVER" to any packets coming from unknown or the kids computahs.