For security concern, VigorACS enable the validation code mechanism on the login page by default. It provides a basic protection for brute force attack. However, if it is not necessary for your network, you can follow the steps below to disable the validation code check.
1. Go to System >> System Parameter page.
ParameterID 34: EnableValidateCodeCheck. Change the value from true to "false", then click Save.
3. The validation code will be removed from the login page next time you log in.
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