How to tell if a firewall alert is suspicious or not

How can I tell if a Sygate firewall alert is suspicious or not?

For example, I received this message from Sygate just now:

Sygate Personal Firewall: Firefox (firefox.exe) is being contacted from a remote machine [206.13.28.12] using local port 1258 (OPENNL - Open Network Library). Do you want to allow this program to access the network?

How can I tell if this is suspicious or not?

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Posted 5 years ago by Gerard Schroeder in Networking Firewalls

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