I can't open PDF through F5 LTM/ASM

[Hamza]

Hello,

I have an issue with my ASM, i am not able to open a pdf file when using F5 under F5 even if is legal request :

Please, any idea about this issue ?

[Hooni_L]

Hi

in my case

abnomal http protocol.

if you can check the content length, Because Web Firewall solutions view content sizes, signatures are detected when data sizes are different.

[Hamza]

Hi @Hooni_L ,

Thanks

Please note that i have fotgate FW, and test is done without F5.

So FW has not impact.

[Mohamed_Ahmed_Kansoh]

Hi @Hamza , 
Try to disable ASM policy first from your Virtual server and see if this fixed this issue or not ,

-if yes you should see what makes ASM to block opening or downloading PDF files requests ,

-If not you should disable http profile from your virtual server and change virtual server type from standard to performance layer 4 " If this available with you and this web site does not serve production services now " , if this issue resolved , I recommend to disable http parsing against PDF files as clarified in the below KB : 

https://support.f5.com/csp/article/K00445006

but first differentiate if this an ASM issue or not. 

I hope this helps you

[Hamza]

Hi @Mohamed_Ahmed_Kansoh,

Thanks.

For ASM I am using the policy with transparent mode.

For http profile, i have already applicate the irule mentioned in the below KB : 

https://support.f5.com/csp/article/K00445006