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Cisco ASA-5512x Syslog 507003 Error Message - UDP - Inspection Engine

Posted on 2014-10-21
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Last Modified: 2014-10-27
Greetings.  Our ASA syslog has been throwing 507003 errors (see attached graphic). From what I've read, this is normal as the ASA is doing what it's supposed to be doing.

 My only concern is that the source IPs are our internal DNS servers and the destination IPs are either our ISP's DNS or a public DNS I have listed (8.8.8.8).   Anything to be concerned with ?  There are no ill-effects on our network that I can tell.

Cisco Inspection Engine - ASA 5512x Syslog 507003 UDP errors.
Thanks much.
-Stephen
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Question by:lapavoni
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Rafael earned 500 total points
ID: 40395946
in looking at your screen shot I don't see anything out of the ordinary.  Have you checked what logging level you have your syslog set to? This will help with the amount of log captures.

-HTH
-Rafael
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by:anoopkmr
ID: 40399030
507003
Error Message %ASA-3-507003: The flow of type protocol from the originating interface: src_ip / src_port to dest_if : dest_ip / dest_port terminated by inspection engine, reason-

Explanation The TCP proxy or session API terminated a connection for various reasons, which are provided in the message.

    protocol —The protocol for the flow
    src_ip —The source IP address for the flow
    src_port —The name of the source port for the flow
    dest_if —The destination interface for the flow
    dest_ip —The destination IP address for the flow
    dest_port —The destination port for the flow
    reason —The description of why the flow is being terminated by the inspection engine. Valid reasons include:

- Failed to create flow

- Failed to initialize session API

- Filter rules installed/matched are incompatible

- Failed to consolidate new buffer data with original

- Reset unconditionally

- Reset based on “service reset inbound” configuration

- Disconnected, dropped packet

- Packet length changed

- Reset reflected back to sender

- Proxy inspector reset unconditionally

- Proxy inspector drop reset

- Proxy inspector received data after FIN

- Proxy inspector disconnected, dropped packet

- Inspector reset unconditionally

- Inspector drop reset

- Inspector received data after FIN

- Inspector disconnected, dropped packet

- Could not buffer unprocessed data

- Session API proxy forward failed

- Conversion of inspect data to session data failed

- SSL channel for TLS proxy is closed

Recommended Action None required.
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Author Comment

by:lapavoni
ID: 40400391
ASDM logging is set to "warnings" and 507003 is also set to "warnings".  Should I change to "notifications" or "informational".  It is intermittent.  Haven't seen for a couple days.
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Author Closing Comment

by:lapavoni
ID: 40407185
Doesn't seem to be an issue. Thanks for the clarification.
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