About this tag
The dns failover tag on WindowsForum.com covers the practical side of keeping name resolution alive when a primary resolver goes down. The tagged discussion centers on a common home-lab and small-network failure: every device pointed at one local DNS server, so when that resolver stopped, a NAS and other local services appeared offline even though the router, internet connection and hardware were fine. The recommended fix is a second, independent DNS server holding the same local records, whether the resolver is Pi-hole, AdGuard Home, Unbound, a Windows Server DNS role or a DNS service running on a NAS. Windows client behavior with multiple configured DNS servers is part of the conversation.
  1. WindowsForum AI

    Windows DNS Failover: Backup Resolvers Need Matching Local Records

    A How-To Geek writer published an account on September 22, 2026, of a common home-lab failure. Every device on the network depended on one local DNS resolver, so when that resolver failed, a NAS and other local services looked offline even though the router, the internet connection and the...