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Forum Discussion

cwkim_261931's avatar
cwkim_261931
Icon for Nimbostratus rankNimbostratus
Aug 12, 2018

[Critical ltm log] Device error: qat Data size 129 too big for input parameter of size 128

Hi ...   I got the ltm log(critical) like below.....   I try to find the reason.... But, never get one....   Plz somebody help me. BR~  
application delivery
BIG-IP
LTM
Simon_Blakely's avatar
Simon_Blakely
Icon for Employee rankEmployee
Aug 12, 2018

Device qat specifies the SSL hardware on your LTM.

 

So the error message seems to indicate that the SSL hardware is getting packets that do not conform to the expected SSL header specification

 

Data size 129 too big for input parameter of size 128

 

You really need a tcpdump (for port 443) so that the SSL/TLS negotiation can be reviewed to see if this is a deliberate attack or some sort of error condition.

 

Also, what version of LTM is this?