Introduction

First, RTFM.

Have you read it? If you haven't go read it. Cuz I'll keep everything short.

This is a dns01 solver for FreeDNS.

Pull requests welcome. I'm now somewhat familiar with golang. You can also look at other and choose the one that fits your need.

Install

$ cd deploy
$ helm show values freedns-webhook > my-values.yaml
$ edit my-values.yaml
$ helm install -n cert-manager [INSTALLATION_NAME] freedns-webhook/ -f my-values.yaml

ClusterIssuer for Let's encrypt staging

apiVersion: cert-manager.io/v1
kind: ClusterIssuer
metadata:
  name: letsencrypt-staging
spec:
  acme:
    email: myemail@example.com
    server: https://acme-staging-v02.api.letsencrypt.org/directory
    privateKeySecretRef:
      name: le-staging
    solvers:
    - dns01:
        webhook:
          groupName: acme.freedns.afraid.org
          solverName: freedns-solver
          config:
            secretName: freedns-auth

FreeDNS webhook settings

Normally if you haven't changed anything, the default namespace should be cert-manager. It should be within the same namespace for the webhook when you do helm install webhook -n cert-manager.

Additionally, the following names can be customized

• acme.freedns.afraid.org

UPDATE

2026-05-21

• Merged the latest upstream changes.
• Added SOCKS5_PROXY support to work around FreeDNS IP-based blocking.
• Added Helm values support for pinning container images by digest.
• Fixed the logging implementation to use cert-manager’s logging infrastructure correctly.
• Moved the default container image registry from Docker Hub to GHCR.

2024-10-30

• Merged from upstream, now works on 1.31 cluster

2024-11-02

• Webhook will now properly logs its actions
• Removed permissions to read secrets from pod for obvious reansons
  • Authentication details are now requested from Helm
  • You should remove the old secret freedns-auth. It is now handled by Helm.