Also review any denied traffic originating from inside the network for evidence of attempted attacks or serious security incidents. Install security patches on hosts. Attackers can quickly identify or develop exploits against vulnerabilities in software products. Check with manufacturers for the frequent patches and updates that protect their products. Establish secure remote connections for the network.
Many security breaches take advantage of weaknesses in remote access.
For more secure remote connections to the network, use strong passwords and authentication, such as that provided by tokens and smart cards, a VPN, or private network with encryption. Use honeypots or decoy technology. Guard the physical security of sensitive systems. If there is insufficient physical security guarding hardware containing mission-critical systems, then these systems are vulnerable to theft or malicious destruction on the premises, thus rendering all other security measures are futile. Review Web scripts, especially active server pages and cgi scripts, for security vulnerabilities.