Why do I have to block incoming DNS from WAN
I never had to make a rule for incoming DNS request from WAN_to_Zywall, because it is blocked by default. Now I have a Zywall 110 where I did have to make such a rule! If I check the policy Control rules there is nowhere another rule such as WAN_to_Zywall that allows DNS in anyway. The only rule that allows WAN_to_Zywall is my own Fixed IP addresses from office. Are there any hidden rules in Zywall where there still could be an opening?
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