192.168.0.0/16 is a privately addressed netblock. These packets could not be routed over the Internet. Do you NAT at your edge router and were these traces obtained from the "internal" interface of your router? If so, this would have to be something on your internal network broadcasting this traffic. Jonathan Andrews, CISSP CCSA Sr. Information Security Analyst Network Security Group Deloitte & Touche -----Original Message----- From: Julian Young [mailto:julian.youngat_private] Sent: Monday, December 09, 2002 3:38 AM To: incidentsat_private Subject: Odd entries in my Security Router logs I keep seeing these entry in my external routers log files. Does any one recognize theme and know what type of attack they are. ok is obviously something to do with DHCP. but i recently had a firewall compromised and i still don't know how. since that wall had dhcp open I wounder if this could have been the trick. I has left the ip number as they are since none of them belong to me or in any range i use ! # Time Packet Information Reason Action 1|Dec 8 02 |From:192.168.7.249 To:192.168.255.254 |match |block | 09:37:12 |UDP src port:00068 dest port:00067 |service deny | 2|Dec 8 02 |From:192.168.8.250 To:192.168.255.254 |match |block | 09:37:12 |UDP src port:00068 dest port:00067 |service deny | 3|Dec 8 02 |From:192.168.7.249 To:192.168.255.254 |match |block | 15:45:32 |UDP src port:00068 dest port:00067 |service deny | ---------------------------------------------------------------------------- This list is provided by the SecurityFocus ARIS analyzer service. For more information on this free incident handling, management and tracking system please see: http://aris.securityfocus.com - This message (including any attachments) contains confidential information intended for a specific individual and purpose, and is protected by law. - If you are not the intended recipient, you should delete this message and are hereby notified that any disclosure, copying, or distribution of this message, or the taking of any action based on it, is strictly prohibited. ---------------------------------------------------------------------------- This list is provided by the SecurityFocus ARIS analyzer service. For more information on this free incident handling, management and tracking system please see: http://aris.securityfocus.com
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