An intrusion detection system (IDS) is used to detect and block attacks, including worms, network viruses and other malware that cannot be detected by a conventional firewall.  Firewalls lack some degree of sophistication in identifying malicious internet traffic.  An IDS gathers system information, analyzes it for unusual events.
 
Our engineers recommend the CISCO Intrusion Prevention System most often, but are well versed in other IDS products.

Cisco IPS defeats threats from multiple vectors, including network, server, and desktop endpoints. It extends across Cisco platforms, from purpose-built appliances, integrated firewall and IPS devices, to service modules for routers and switches. Cisco IPS protects the network from policy violations, vulnerability exploitations, and anomalous activity.