[other] **TCP FIN Scan** Help Please

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http://ubuntuforums.org – I keep getting the **TCP FIN Scan** message appear in my router's security log and am really worried about it because I don't know if it's anything serious or if it's nothing to worry about. I keep getting both Inbound and Outbound on them and that is something I'm not too sure about. Some of the IP Addresses for the Outbound ones are, and and they all seem to lead to a website that offers hosting services for other websites so I don't know what that fully means. As for the Inbound ones, they are, and and ()