Category Archives: DNS

Raspberry Pi as a bind DNS slave and an exim MX backup

DRAFT, to be completed, but this still might help you: This was for an Rpi B with 512MB RAM. ¬†Raspbian Jessie. This is a custom exim 4.86 TLS build to use OpenSSL instead of GNUTLS. Follow the instructions here, to … Continue reading

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The importance of using stateful firewall rules on port 53 (DNS)

Scenario A firewall appliance forwards DNS traffic to the outside world. The traffic generated is e.g. for Server 2008 as per here in Technet, i.e. Traffic Type Source of Transmission Source Port Destination of Transmission Destination Port Queries from local … Continue reading

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