Weighted Round Robin App

A DNS App for Technitium DNS Server that performs weighted selection of answers from APP record data.

Overview

• APP-record driven – no root-level dnsApp.config
• Weighted selection – answers are chosen according to weights in the APP record payload
• Per-zone flexibility – different zones can define different weighted sets

Integration / extension points

• Implements: IDnsApplication, IDnsAppRecordRequestHandler
• Runs as an APP-record request handler.

Configuration

dnsApp.config is not used by this app.

The app reads weighted answer data from the APP record JSON for the target name.

Runtime behavior

1. The app reads weighted entries from the APP record payload.
2. It selects an answer based on the configured weights.
3. It returns the chosen A/AAAA/CNAME-style record data as an authoritative response.

Risks / operational notes

• Misconfigured weights can skew traffic distribution.
• DNS caching affects perceived distribution; TTL matters.
• Keep weighted sets small and intentional.

Troubleshooting

• Confirm the APP record contains valid JSON.
• Confirm the weighted entries contain the expected addresses/targets.