Configuring and using DNS firewall

Scenario: You are running a service that is dinamically resolved through a geohost (ie. and you need to set up security and DNS resolution rules to: respond “NXDOMAIN” (FQDN not found) to all Internet clients running malware that try to resolve always allow (whitelist) DNS resolution from your own public IP subnet (ie. DNS resolution will take place according to the geohost configuration (to set up your geohost please refer to one of our howtos listed here below) respond with CNAME “” to queries coming from subnet     How to configure it: Log on to using your credentials or register if you still don’t… Read More

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