ASA Firewall - Invalid transport field for protocol
Hello, good afternoon
We have implemented ASA firewall platform and would like to get help with the security events: ASA 5550 ASA Version: 8.0(4) ASDM Version: 6.1(5)51
From ASA we send syslog to remote server SIEM. Our SIEM correlated events and generating the following offense: Event Information Event Name: Invalid transport field for protocol Low Level Category: System Error Event Description: This message appears when there is an invalid transport number, in which the source or destination port number for a protocol is zero. The protocol value is 6 for TCP and 17 for UDP.
ASA Firewall event: <164>Jul 02 2014 15:40:19: %ASA-4-500004: Invalid transport field for protocol=UDP, from ac1_autoprestacio/21128 to 22.214.171.124/0
I have a lotconnections frommyfirewalltopublicIPaddresses whosedestinationport is 0.
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We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...