firewall does not stop keyloggers.
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True
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False
Firewalls primarily control network traffic and cannot detect keyloggers that operate locally without transmitting data. Hardware keyloggers (physical devices) and software keyloggers that only log locally are invisible to firewalls. Even keyloggers that transmit data can avoid detection if they use allowed protocols or ports. Anti-malware software, not firewalls, is needed to detect keyloggers.
A firewall controls network traffic in and out of a system — it decides which connections are allowed, not what a program does locally on the machine. A keylogger captures keystrokes directly on the infected device, an activity that doesn't necessarily require it to reach out over the network in a way a firewall would inspect, so a firewall alone doesn't stop it from operating.