diff --git a/client/internal/dns/server.go b/client/internal/dns/server.go index e689f3586..151a4b3e4 100644 --- a/client/internal/dns/server.go +++ b/client/internal/dns/server.go @@ -772,13 +772,24 @@ func (s *DefaultServer) applyHostConfig() { // context is released rather than leaked until GC. func (s *DefaultServer) registerFallback() { originalNameservers := s.hostManager.getOriginalNameservers() - if len(originalNameservers) == 0 { + + serverIP := s.service.RuntimeIP() + var servers []netip.AddrPort + for _, ns := range originalNameservers { + if ns == serverIP { + log.Debugf("skipping original nameserver %s as it is the same as the server IP %s", ns, serverIP) + continue + } + servers = append(servers, netip.AddrPortFrom(ns, DefaultPort)) + } + + if len(servers) == 0 { log.Debugf("no fallback upstreams to register; clearing PriorityFallback handler") s.clearFallback() return } - log.Infof("registering original nameservers %v as upstream handlers with priority %d", originalNameservers, PriorityFallback) + log.Infof("registering original nameservers %v as upstream handlers with priority %d", servers, PriorityFallback) handler, err := newUpstreamResolver( s.ctx, @@ -792,11 +803,6 @@ func (s *DefaultServer) registerFallback() { return } handler.selectedRoutes = s.selectedRoutes - - var servers []netip.AddrPort - for _, ns := range originalNameservers { - servers = append(servers, netip.AddrPortFrom(ns, DefaultPort)) - } handler.addRace(servers) prev := s.fallbackHandler