Hello!
I used the service Shields up at grc.com to scan my firewall for open ports and since I changed from my Asus router to a Sophos UTM (computer) port 53 are not "stealthed". It is closed, but the remote computer can see that there are something behind the IP-adress..
How can I make sure all packets are dropped when a remote computer scans the firewalll?
I have no firewall rules that is allowing port 53 from wan and as far as I know no services on port 53 on the wan interface..
This looks like a vulnerability. All other ports are stealthed, not responding at all, but port 53 ruins this because it is just "closed"..
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