Https

+++ title = "https" description = "https configures DNS-over-HTTPS (DoH) server options." weight = 27 tags = ["plugin", "https"] categories = ["plugin"] date = "2026-01-08T11:42:04.877481" +++

Description

The https plugin allows you to configure parameters for the DNS-over-HTTPS (DoH) server to fine-tune the security posture and performance of the server.

This plugin can only be used once per HTTPS listener block.

Syntax

https {
    max_connections POSITIVE_INTEGER
}

• max_connections limits the number of concurrent TCP connections to the HTTPS server. The default value is 200 if not specified. Set to 0 for unbounded.

Examples

Set custom limits for maximum connections:

https://.:443 {
    tls cert.pem key.pem
    https {
        max_connections 100
    }
    whoami
}

Set values to 0 for unbounded, matching CoreDNS behaviour before v1.14.0:

https://.:443 {
    tls cert.pem key.pem
    https {
        max_connections 0
    }
    whoami
}