Berts,
The log entries show that there is a machine on your network that is sending a DHCP request in order to get an IP Address, this is causing your Sun firewall to produce the security alert.
Also, it seems like the machine sending the DHCP request is on the same physical network your 'qfe2' ethernet network card is connected. This should help you track down which machine it might be.
If your wondering how to read the information here is the answer:
- if=qfe2 Your network card receiving the DHCP request
- srcaddr=0.0.0.0 Perfectly normal. Any machine that sends a DHCP request has no IP address assigned at that point
- srcport=68 The mystery machine's source port, this value is exactly what you would expect to see in a DHCP request
- dstaddr=255.255.255.255 This indicates a broadcast, expected in a DHCP request
- dstport=67 The destination port of the above broadcast is port 67. This happens to be the same port a DHCP server listens on.
Hope that helps.
Cheers,