box against dos/ddos

Hi, I looking some box (vendor, model), which i can put out of the main/product network, which can analyze packets netflow,sflow,syslog from bgp router(s) and after discover some anomaly it can do some action, for example: - Box have bgp session with bgp router and advertise attacked ip prefix with some community. Bgp router set next-hop for this prefix to /dev/null Normal traffic via bgp router is about 1G/s in and 10G/s out What is worth of looking and what you suggest ? thanks for help, Piotr