Trojan refers to those programs that get into your computer through legitimate ways (most notably through email attachment) and trick you to run them without knowing the consequences.

dennis2 (Dennis)
Firewall, on the other hand, can block those attempts to exploit vulnerablities that exist in networking services (HTTP, FTP etc) or problematic tcp/ip stacks. It does not block legitimate traffic.
2002-2-7 -05:00

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