https://coredns.website.cncfstack.com/tags/forward/Recent content in forward on CoreDNS: DNS and Service DiscoveryHugo -- gohugo.ioen-usCoreDNS - All Rights ReservedMon, 13 Jul 2026 15:51:55 +0000https://coredns.website.cncfstack.com/plugins/forward/Mon, 13 Jul 2026 15:51:55 +0000https://coredns.website.cncfstack.com/plugins/forward/Description The forward plugin re-uses already opened sockets to the upstreams. It supports UDP, TCP, DNS-over-TLS, DNS-over-HTTPS and uses in band health checking. When it detects an error a health check is performed. This checks runs in a loop, performing each check at a 0.5s interval for as long as the upstream reports unhealthy. Once healthy we stop health checking (until the next error). The health checks use a recursive DNS query (.