Why am I getting a dns_error when calling my VPC service?

This usually occurs because your cloudflared version is older than 2025.7.0 or you are using the http2 protocol instead of the required QUIC protocol.

Do I need to include port numbers in the fetch() URL for VPC services?

No, port numbers in the fetch() URL are ignored. Routing and port selection are determined by the VPC service configuration in the Cloudflare dashboard or API.

Can I use public hostnames for services inside my VPC?

You should use internal VPC hostnames to ensure traffic is correctly routed through the secure tunnel and does not leak to the public internet.

Which outbound port is required for Cloudflare VPC Services?

You must allow UDP port 7844 outbound to enable QUIC connections between your infrastructure and Cloudflare's network.

Cloudflare VPC Services for Workers

Name: Cloudflare VPC Services for Workers
Author: nodnarbnitram

bynodnarbnitram

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Cloud Infrastructure

Configures and troubleshoots secure private API access for Cloudflare Workers via encrypted VPC service tunnels.

This skill provides specialized guidance for connecting Cloudflare Workers to private resources in AWS, Azure, GCP, or on-premise networks using Cloudflare VPC Services. It automates the complex setup of VPC service bindings and Cloudflare Tunnels while proactively preventing common pitfalls like DNS errors, protocol mismatches, and incorrect port handling. By enforcing best practices such as mandatory QUIC protocol usage and absolute URL formatting, it significantly reduces deployment time and token overhead for developers building secure, hybrid cloud applications.

Key Features

011 GitHub stars

02Configures cloudflared tunnels with required QUIC protocol settings

03Validates VPC service bindings and internal routing patterns

04Provides production-ready templates for wrangler.jsonc and API payloads

05Diagnoses and resolves dns_error issues in Cloudflare Workers

06Enforces best practices for secure private API connectivity

Use Cases

01Implementing zero-trust network architectures for serverless applications

02Connecting serverless Workers to private internal databases or microservices

03Troubleshooting connectivity between Cloudflare and corporate VPC environments

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add nodnarbnitram/claude-code-extensions cloudflare-vpc-services

For use in Claude.ai and ChatGPT

Download Skill