# File lib/rds/rds.rb, line 203
        def revoke_db_security_group_ingress(group_name, ip_range, options={})
            params = {}
            params['DBSecurityGroupName'] = group_name
            params['CIDRIP'] = ip_range
            link = do_request("RevokeDBSecurityGroupIngress", params)
        rescue Exception
            on_exception
        end