Firewall Protection Against Attacks, Viruses, Trojans

The usual questions that come up in this area include:

Does the Firewall protect against viruses and Trojans?

The Personal Firewall does not check for viruses, but it works well with virus-scanning software. Programs that access the network are checked for Trojans. If one is found, the network access is blocked to that Trojan program, and the program is automatically terminated. The Personal Firewall specifies the location of the Trojans, but does not delete them from your computer.

After updating one of my applications, the Firewall shows a major attack. Do I have a Trojan?

Upgrading any program will change the MD5 checksum, a value that the Personal Firewall uses to verify the integrity of each application on your computer. When the Personal Firewall sees that the executable for an application has been changed, it logs this in the Security Log with a severity of Major. If you have updated the software yourself, then there is probably no Trojan attached to it. However, if you have not updated the software and you receive this message, you should block the application and install a virus scanner using the latest signatures to remove this Trojan.

Does the Firewall do Stateful Packet Inspection?

Yes, the Personal Firewall does Stateful Packet Inspection on every Remote TCP connection. The Personal Firewall also uses an algorithm to check Remote UDP and DHCP traffic to make sure that the communication is secure.