Forum Discussion
Blue_whale
Cirrocumulus
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 ...
chrros95
Cirrus
Mar 24, 2026I 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)
- ASCapiApr 08, 2026
Cirrus
Blue_whale on the link KB provides by chrros95 you got all you need to change it.
As you like in CLI or GUI.
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