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Blue_whale
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Mar 24, 2026

[ASM] : "Request length exceeds defined buffer size " - How to increase the limit ?

Hi Experts , 

 

WAF is rejecting the request because it exceeds the maximum allowed request size (10MB)

 

Requested URL : [HTTPS] /stock.option

Host : trade-it.ifund.com

 

 

Detected Request Length : 12005346 bytes ( 12 MB )

Expected Request Length : 10000000 bytes ( 10 MB )

 

How to increase the limit specific to this url/uri only ?

 

1 Reply

  • I am not aware of an option that does this for a specific URL.
    My suggestion is to change the long_request_buffer_size as described in K01235989 and activate an iRule/LTM policy that blocks larger requests on all other URL and virtual servers (if needed).

    Alternatively you can bypass the ASM for the path completely (K22021244)