diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6d11db20..33a36ee4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,8 +19,10 @@ and this project adheres to
 
 ### Fixed
 
+- Incomplete DNS upstreams validation ([#2674]).
 - Wrong parsing of DHCP options of the `ip` type ([#2688]).
 
+[#2674]: https://github.com/AdguardTeam/AdGuardHome/issues/2674
 [#2688]: https://github.com/AdguardTeam/AdGuardHome/issues/2688
 
 
diff --git a/internal/dnsforward/config.go b/internal/dnsforward/config.go
index a80e7ad5..81864899 100644
--- a/internal/dnsforward/config.go
+++ b/internal/dnsforward/config.go
@@ -282,7 +282,7 @@ func (s *Server) prepareUpstreamSettings() error {
 	}
 
 	if len(upstreamConfig.Upstreams) == 0 {
-		log.Info("Warning: no default upstream servers specified, using %v", defaultDNS)
+		log.Info("warning: no default upstream servers specified, using %v", defaultDNS)
 		uc, err := proxy.ParseUpstreamsConfig(defaultDNS, s.conf.BootstrapDNS, DefaultTimeout)
 		if err != nil {
 			return fmt.Errorf("dns: failed to parse default upstreams: %v", err)
diff --git a/internal/dnsforward/http.go b/internal/dnsforward/http.go
index e7508bc8..527d3b38 100644
--- a/internal/dnsforward/http.go
+++ b/internal/dnsforward/http.go
@@ -8,6 +8,7 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/AdguardTeam/dnsproxy/proxy"
 	"github.com/AdguardTeam/dnsproxy/upstream"
 	"github.com/AdguardTeam/golibs/log"
 	"github.com/AdguardTeam/golibs/utils"
@@ -314,6 +315,11 @@ func ValidateUpstreams(upstreams []string) error {
 		return nil
 	}
 
+	_, err := proxy.ParseUpstreamsConfig(upstreams, []string{}, DefaultTimeout)
+	if err != nil {
+		return err
+	}
+
 	var defaultUpstreamFound bool
 	for _, u := range upstreams {
 		d, err := validateUpstream(u)
diff --git a/internal/home/home.go b/internal/home/home.go
index 422312a6..bfc17750 100644
--- a/internal/home/home.go
+++ b/internal/home/home.go
@@ -320,6 +320,7 @@ func run(args options) {
 		go func() {
 			err := startDNSServer()
 			if err != nil {
+				closeDNSServer()
 				log.Fatal(err)
 			}
 		}()