• Virtual Private Cloud

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  3. User Guide
  4. Security
  5. Security Group Configuration Examples
  6. Enabling an ECS to Function as a DNS Server

Enabling an ECS to Function as a DNS Server

  • Example scenario:

    If you need to use an ECS as the DNS server, you must allow TCP and UDP access from port 53 to the DNS server. You can add the following rules to the security group associated with the ECS.

  • Security group configuration:

    Protocol

    Direction

    Port/Range

    Source

    TCP

    Inbound

    53

    0.0.0.0/0

    UDP

    Inbound

    53

    0.0.0.0/0