“We can’t respond to every individual snippet of information – every rumor, every shred,” says Brian Honan. “There’s always been a fashion du jour in infosec, and the current one is information sharing,” he says. “You just don’t have the capabilities to do that,” says Honan, who’s also a cybersecurity adviser to the security adviser of European police agencies known as Europol. “If you go back and check your firewall logs, you can’t. respond to. every port scan, even though a port scan could be attackers looking to scan your.”]
Source: https://www.govinfosecurity.com/blogs/threat-intelligence-lessons-from-paris-attacks-p-1986