<rule_number> is the number of the existing rule that you want to modify.
<start_ip> is the starting IP address.
<end_ip> is the ending IP address.
<role> is the role for which you want to modify an access control rule.
<policy> is one of these options:
allow – Accepts traffic from the specified IP address range when the user is a member of the specified role.
deny – Drops traffic from the specified IP address range when the user is a member of the specified role.