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ASA 5520 ASDM Syslog messages

Posted on 2013-12-17
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Last Modified: 2013-12-24
Hello,

I'm seeing the asdm syslog messages roll by with the following:

IP = <IP Address> Header invalid, missing SA payload! (next payload = 4)

I do have VPNs configured, one site-to-site and the other a regular one. Neither of those originate from the IP address mentioned.

I put that IP into a drop ACL at the begining on the outside interface and it still keeps on coming.

Any idea on what this is and why its happening? How do i stop it?

Thanks
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Question by:netcmh
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Expert Comment

by:TMekeel
ID: 39724479
Did you remove any VPNs?

Can you try clear crypto isakmp sa invalid ip address?

edited for I typed the command incorrectly....
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Author Comment

by:netcmh
ID: 39724634
When I issued that command, I got this:

Can't find a valid tunnel group, aborting...

I don't have that IP anywhere in my config.
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Expert Comment

by:TMekeel
ID: 39725053
Can you try rebooting the device and see if it persists?
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Author Comment

by:netcmh
ID: 39725072
I could. It'll have to wait till maintenance window. Early next month.

Anything else I could try in the mean while?
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Expert Comment

by:TMekeel
ID: 39725576
The only thing I could think of is to reset the tunnel, but we tried clearing already, and you have an ACL to block inbound on the outside interface...not sure what else to do besides reboot or call TAC and ask!


Perhaps another Expert can chime in;  I'm sorry I don't know off the top of my head.  I will try some google-fu for you though and see if I can gain some knowledge to pass on.
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netcmh earned 0 total points
ID: 39729800
Got it figured out.

Did a reverse IP lookup. Found the company. Called them.

They had a vendor with that IP earlier. Got in touch with their infrastructure team, verified that the config belonged to the old vendor (who has now changed their IP), and had it removed.

The sessions stopped.
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Author Closing Comment

by:netcmh
ID: 39737638
This was the solution.
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