{"id":24927,"date":"2026-10-11T13:32:13","date_gmt":"2026-10-11T13:32:13","guid":{"rendered":"https:\/\/atalnetworks.com\/?p=24927"},"modified":"2026-10-11T13:36:48","modified_gmt":"2026-10-11T13:36:48","slug":"ipv6-hosting-migration-checklist","status":"publish","type":"post","link":"https:\/\/atalnetworks.com\/es\/ipv6-hosting-migration-checklist\/","title":{"rendered":"IPv6-First Hosting Migration: An Atal Networks Dual-Stack Deployment Checklist"},"content":{"rendered":"

An IPv6 hosting migration starts with the services that must keep working: customer logins, API requests, payment callbacks, backups, and administrative access. Adding an IPv6 address is one step. Keeping those services reachable is the deployment goal.<\/span><\/p>\n

We use this checklist to connect application requirements with infrastructure decisions. We plan IPv6 support across each traffic path, retain IPv4 where it remains necessary, and define the evidence required before a wider rollout.<\/span><\/p>\n

Bring the resulting requirements to Atal Networks to discuss a suitable hosting and routing setup. Confirm capabilities for your chosen service and location before committing to the design.<\/span><\/p>\n

1. Choose an IPv6-First Architecture<\/span><\/h2>\n

IPv6-first means we plan for IPv6 support from the start. Dual-stack means a network or service supports both IPv4 and IPv6.<\/b> Neither term means that every application dependency already works over IPv6.<\/span><\/p>\n

We separate four paths: customers to the public endpoint, the public endpoint to the application server, applications to external services, and administrators to management systems.<\/span><\/p>\n\n\n\n\n\n\n\n\n
Architecture<\/b><\/th>\nSuitable use<\/b><\/th>\nCheck before deployment<\/b><\/th>\n<\/tr>\n<\/thead>\n
Dual-stack endpoint and origin<\/span><\/td>\nDirect access over both address families<\/span><\/td>\nRouting, listeners, security, and monitoring for each family<\/span><\/td>\n<\/tr>\n
Dual-stack proxy with IPv4 origin<\/span><\/td>\nPublic IPv6 access before origin migration<\/span><\/td>\nProxy protocol support and client-address handling<\/span><\/td>\n<\/tr>\n
Dual-stack proxy with IPv6-only origin<\/span><\/td>\nRemoving IPv4 from the origin tier<\/span><\/td>\nBackend connectivity, health checks, dependencies, and management<\/span><\/td>\n<\/tr>\n
IPv6-only workload with outbound translation<\/span><\/td>\nAccess to IPv4-only external services<\/span><\/td>\nApplication compatibility, translation capacity, and recovery<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

A content delivery network may accept IPv6 connections while reaching the origin over IPv4. Public IPv6 access therefore does not prove that the origin supports IPv6. Cloudflare documents separate client-facing and origin-connection behavior.[1]<\/span><\/p>\n

We choose the architecture per service rather than assuming the entire platform must change at once.<\/span><\/p>\n

2. Inventory Applications and Dependencies<\/span><\/h2>\n

Our inventory needs to explain what each service connects to, in both directions.<\/span><\/p>\n

Include websites, APIs, databases, queues, identity providers, payment systems, webhooks, email, package repositories, license servers, backups, monitoring, and deployment tools.<\/span><\/p>\n

Check for hardcoded IPv4 addresses, IPv4-only application libraries, IP-based allowlists, and address fields that cannot store IPv6. Review container networking and VPN access as well as the host operating system.<\/span><\/p>\n

Use a record like this for each dependency:<\/span><\/p>\n\n\n\n\n\n\n\n\n\n\n\n
Field<\/b><\/th>\nExample entry<\/b><\/th>\n<\/tr>\n<\/thead>\n
Service<\/span><\/td>\nCustomer API<\/span><\/td>\n<\/tr>\n
Traffic direction<\/span><\/td>\nOutbound to billing provider<\/span><\/td>\n<\/tr>\n
Current requirement<\/span><\/td>\nProvider accepts an IPv4 source allowlist<\/span><\/td>\n<\/tr>\n
Owner<\/span><\/td>\nApplication team<\/span><\/td>\n<\/tr>\n
Acceptance test<\/span><\/td>\nSuccessful request from the approved source address<\/span><\/td>\n<\/tr>\n
Temporary decision<\/span><\/td>\nRetain controlled IPv4 egress<\/span><\/td>\n<\/tr>\n
Review trigger<\/span><\/td>\nBilling provider adds supported IPv6 access<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

This is an illustrative record, not a test result. The completed inventory gives us a clear list of blockers, owners, and temporary IPv4 requirements.<\/span><\/p>\n

3. Plan Addresses Around the Hosting Service<\/span><\/h2>\n

An IPv6 address assigned to a server and a prefix routed to a customer network serve different purposes. We confirm which arrangement the workload needs before selecting infrastructure.<\/span><\/p>\n

Ask the provider to confirm the address or prefix allocation, gateway, routing method, reverse-DNS control, and any restrictions on using addresses behind a virtual machine or router.<\/span><\/p>\n

For ordinary LANs using stateless address autoconfiguration, \/64 is the usual subnet size. That does not mean every VPS includes a \/64, or that host routes and specialized router links use the same design.<\/span><\/p>\n

We record allocations by location, environment, application, and tenant in an IP address management system. Reserve room for growth and define stable addresses for services and outbound allowlists.<\/span><\/p>\n

Follow the provider’s instructions for static settings, router advertisements, DHCPv6, and default routes. Do not assume DHCPv6 alone supplies the default gateway. Record renumbering responsibilities if the hosting arrangement changes.<\/span><\/p>\n

4. Prepare DNS Before Publishing AAAA Records<\/span><\/h2>\n

An A record identifies an IPv4 address. An AAAA record identifies an IPv6 address. Neither record converts traffic between the two protocols.<\/b><\/p>\n

We publish AAAA records after confirming that the intended endpoint accepts IPv6 traffic, presents the correct TLS certificate, completes application requests, and applies the required security controls.<\/span><\/p>\n

Keep A records wherever IPv4 access remains part of the design. The protocol used to query DNS does not determine whether the answer contains A or AAAA records.<\/span><\/p>\n

Before release, check:<\/span><\/p>\n