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illegal tcp flags

rnaydenov
Level 1
Level 1

‎10-25-2006 03:10 AM - edited ‎03-09-2019 04:39 PM

Hi,

Recently on my servers I've been seeing some events generated by the Cisco Security Agent (4.5.1-616), which say:

Illegal TCP reserved flags set

I,ve attached one such log. Can someone say exactly what is wrong with this?

Labels:
23915-illegal-flags.log
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pciaccio
Level 4
Level 4

‎10-25-2006 03:53 AM

from you r log I see on your flags that it is set for Ack and Push. From the log this is a SMTP protocol. My guess is that your mail server is trying to push (Process the user data ASAP) this Ack and your security agent does not allow it or like the process. This may be a security agent configuration issue that you will have to investigate further.

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