F5 ASM - Illegal File type

File Туре
0etett'0r1 Cause
Apphed Blocking Settngs
0jsa]10wed Яе Туре

If the file type shoud be allowed, i.e It is a False Positive

Go to: Security ›› Application Security ›› Security Policies ›› Policies List ›› ›› HTTP Message Protection ›› File Types

Filter for the name of the file type in the disallowed section

O Allowed File Types ready to be enforced
File Type Name
3 Allowed File Ty
Wildcard
Allowed
Status
Any Status
Apply
X Disallowed

And then click Delete

O Allowed File Types ready to be enforced 3 Allowed File Types have suggestions
Y • File Type: bak X EnforcementType: Disallowed X
File Type
Allowed
URL Length
Request
Length
Create •
Query String
Length
Enforce
POST Data
Length
Delete
I Entry
Status

The file type will now be allowed because it will now match the wildcard file type in the allowed file types section

Delete the Event Log