For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

Rahul_More's avatar
Rahul_More
Icon for Cirrus rankCirrus
Nov 11, 2020

"Illegal parameter value length" events when parameter is already at that value

Hi, The security policy is in transparent mode and when I enable block mode for site. The "Illegal parameter value length" logs are appearing in events request and the requested page is getting bloc...
application delivery
ASM Advanced WAF
security
Ivan_Chernenkii's avatar
Ivan_Chernenkii
Icon for Employee rankEmployee
Nov 17, 2020

Do you get "Illegal Parameter Value Length" violation for "ctl00" parameter? With what details (better screenshot)?

Did you apply policy after set length to any?