I have an ASA with the following: What does the following mean? "Deny TCP (no connection) from/to flags FIN ACK on interface inside"

I keep getting the above error.  It is not explicitly denying the packet, but was wondering what the error means.
NWSBexchAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Istvan KalmarHead of IT Security Division Commented:
It means basically the TCP packet was sent with something other than the syn flag sent. Therefore the ASAwould check its connection table, no previous connection existed and the packet gets denied.
0
Istvan KalmarHead of IT Security Division Commented:
But I seen this messege when I used 8.0.4 on 5505 with Oracle communication, after that I downgraded the ASA the problem is discontinued!

Do you have a problem on qour network, or you inquiring?
0
Voltz-dkCommented:
It is a common log.  It's a packet that is received after the connection has been closed down in the ASA.
If you have syslog on informational, you'll see that you receive a Teardown syslog (which also states why it's closed) on the connection in question prior to this deny.
The packet is indeed denied, but it's got FIN flag set so it's part of the graceful connection teardown anyways.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
NWSBexchAuthor Commented:
So this is not necessarily a bad thing, but just part of the "tear down" process?
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Anti-Virus Apps

From novice to tech pro — start learning today.