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DNS Block&Redirect Configurer

Allows to set Redirect and Block rules to your Cloudflare and NextDNS accounts.

Ready-to-run via GitHub Actions. Video guide

Comparison of Free Plans: NextDNS vs Cloudflare

	NextDNS	Cloudflare
DNS Query Limit	300,000 per month	100,000 per day
IPv4 Restrictions	DNS queries are limited to a single IP address (can be changed)	DNS queries are strictly limited to a single IP address (automatically assigned by Cloudflare and cannot be changed)
DoH / DoT / IPv6	Unlimited	Unlimited
Setup API Limits	60 requests per minute	Unlimited
General Limitations	None	Infrastructure is blocked by Roskomnadzor (availability issues in Russia)
Advantages	Built-in ad and tracker blocking options	More reliable and fast infrastructure

In summary: if you are located in Russia, NextDNS is your only viable option due to Roskomnadzor restrictions.

If you are in another country, Cloudflare offers more generous limits on the free plan. Tracker and ad blocking can also be enabled by providing a domain blocklist in BLOCK, for example: https://small.oisd.nl/domainswild2

Easy Setup

Use the configurator https://dns-conf-ui.vercel.app in Quick mode. It will automatically configure your DNS profile and perform all required GitHub setup steps.

You only need to sign in with GitHub and provide CLIENT_ID and AUTH_SECRET. More details on where to find these values here: Setup credentials

Standard Setup

Setup credentials

Setup profile

Setup data sources

Setup exclude redirects (optional)

Multiple profiles setup

GitHub Actions

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Setup credentials

NextDNS credentials setup

1. Generate API KEY, from https://my.nextdns.io/account and set as environment variable AUTH_SECRET

2. Click on NextDNS logo. On the opened page, copy ID from Endpoints section. Set it as environment variable CLIENT_ID

Cloudflare credentials setup

1. After signing up into a Cloudflare, navigate to Zero Trust tab and create an account.

• Free Plan has decent limits, so just choose it.
• Skip providing payment method step by choosing Cancel and exit (top right corner)
• Go back to Zero Trust tab

2. Create a Cloudflare API token, from https://dash.cloudflare.com/profile/api-tokens

with 2 permissions:

Account.Zero Trust : Edit

Account.Account Firewall Access Rules : Edit

Set API token to environment variable AUTH_SECRET

3. Get your Account ID from : https://dash.cloudflare.com/?to=/:account/workers

Set Account ID to environment variable CLIENT_ID

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Setup profile

Set environment variable DNS with DNS provider name (Cloudflare or NextDNS)

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Setup data sources

Each data source must be a link to a hosts file, e.g. https://raw.githubusercontent.com/Internet-Helper/GeoHideDNS/refs/heads/main/hosts/hosts

You can provide multiple sources split by coma: https://first.com/hosts,https://second.com/hosts

1) Setup Redirects

Set sources to environment variable REDIRECT

Script will parse sources, filtering out redirects to 0.0.0.0 and 127.0.0.1

Thus, parsing lines:

0.0.0.0 domain.to.block
1.2.3.4 domain.to.redirect
127.0.0.1 another.to.block

will keep only 1.2.3.4 domain.to.redirect for the further redirect processing.

• Redirect priority follows sources order. If domain appears more than one time, the first only IP will be applied.

2) Setup Blocklist

Set sources to environment variable BLOCK

Script will parse sources, keeping only redirects to 0.0.0.0, 127.0.0.1, ::1, and also lines containing domain only.

Thus, parsing lines

1.2.3.4 domain.to.redirect
0.0.0.0 domain.to.block
127.0.0.1 another.to.block
::1 ipv6.to.block
no-ip.just.domain

will keep only

domain.to.block
another.to.block
no-ip.just.domain
ipv6.to.block

for the further block processing.

• You may want to provide the same source for both BLOCK and REDIRECT for Cloudflare.
• For NextDNS, the best option might be to set REDIRECT only, and then manually choose any blocklists at the Privacy tab.

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Setup exclude redirects (optional)

Put domains to environment variable EXCLUDE_REDIRECT separated by coma, e.g. instagram.com,twitch.com

These domains and their subdomains:

• will be removed from existing redirect rules;
• won't be added with new ones.

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Multiple profiles setup

Restrictions

All profiles get similar settings. That means BLOCK, REDIRECT and EXCLUDE_REDIRECT are shared.

Multiple profiles of single provider

Put your profiles separated by coma without whitespace into related environment variables. E.g., two NextDNS profiles must be set as shown:

• AUTH_SECRET has: secret_NextDns_1,secret_NextDns_2
• CLIENT_ID has client_id_NextDns_1,client_id_NextDns_2

Multiple profiles of different providers

In addition to setting above, list provider for each profile in environment variable DNS. For example:

• DNS has: NEXTDNS,CLOUDFLARE,NEXTDNS
• AUTH_SECRET has: secret_NextDns_1,secret_Cloudflare_1,secret_NextDns_2
• CLIENT_ID has client_id_NextDns_1,client_id_Cloudflare_1,client_id_NextDns_2

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Script Behaviour

Cloudflare

Previously generated data will be removed. Script recognizes old data by marks:

• Name prefix for List: Blocked websites by script and Override websites by script
• Name prefix for Rule: Rules set by script
• Different Session id. Session id is stored in a description field.

After removing old data, new lists and rules will be generated and applied.

If you want to clear Cloudflare block/redirect settings, launch the script without providing sources in related * environment variables*. E.g. providing no value for environment variable BLOCK will cause removing old related data: lists and rules used to setup blocks.

NextDNS

For REDIRECT:

• Existing domain will be updated if redirect IP has changed
• If new domains are provided, they will be added
• The rest redirect settings are kept untouched

For BLOCK:

• If new domains are provided, they will be added
• The rest block settings are kept untouched

Previously generated data is removed ONLY when both BLOCK and REDIRECT sources were not provided.

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GitHub Actions setup

Step-by-step video guide: REDIRECT for NextDNS

Steps

1. Fork repository
2. Go Settings => Environments
3. Create New environment with name DNS
4. Provide AUTH_SECRET and CLIENT_ID to Environment secrets
5. Provide DNS,REDIRECT, BLOCK and EXCLUDE_REDIRECT to Environment variables

• The action will be launched every day at 01:30 UTC. To set another time, change cron at .github/workflows/github_action.yml
• You can run the action manually via Run workflow button: switch to Actions tab and choose workflow named DNS Block&Redirect Configurer cron task