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Cisco ASA 8.03 Log Message?

I see alot of these messages on our Firewall a Cisco ASA 5510 and we are not running this protocol, any ideas what it actually is?

local4.alert %ASA-1-106021:Deny SCPS reverse path check from 0.0.0.0 to 172.29.4.1 on interface dmz1

local4.alert %ASA-1-106021:Deny SCPS reverse path check from 0.0.0.0 to 172.29.5.1 on interface dmz2

local4.alert %ASA-1-106021:Deny SCPS reverse path check from 0.0.0.0 to 172.29.6.1 on interface dmz3

local4.alert %ASA-1-106021:Deny SCPS reverse path check from 0.0.0.0 to 172.29.7.1 on interface dmz4

local4.alert %ASA-1-106021:Deny SCPS reverse path check from 0.0.0.0 to 172.29.8.1 on interface inside

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Re: Cisco ASA 8.03 Log Message?

Explanation This message is generated when a packet arrives at the security appliance interface that has a destination IP address of 0.0.0.0 and a destination MAC address of the security appliance interface. In addition, this message is generated when the security appliance discarded a packet with an invalid source address, which can include one of the following or some other invalid address.

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