diff --git a/kvas2.go b/kvas2.go
index 63a0a04..09ee134 100644
--- a/kvas2.go
+++ b/kvas2.go
@@ -227,7 +227,7 @@ func New(config Config) (*App, error) {
 
 	app.Records = NewRecords()
 
-	app.DNSOverrider, err = iptablesHelper.NewDNSOverrider(fmt.Sprintf("%s_DNSOVERRIDER", app.Config.ChainPostfix), app.Config.ListenPort)
+	app.DNSOverrider, err = iptablesHelper.NewDNSOverrider(fmt.Sprintf("%sDNSOVERRIDER", app.Config.ChainPostfix), app.Config.ListenPort)
 	if err != nil {
 		return nil, fmt.Errorf("failed to initialize DNS overrider: %w", err)
 	}
diff --git a/main.go b/main.go
index 1d82fee..58f8f98 100644
--- a/main.go
+++ b/main.go
@@ -13,7 +13,7 @@ import (
 func main() {
 	app, err := New(Config{
 		MinimalTTL:             time.Hour,
-		ChainPostfix:           "KVAS2",
+		ChainPostfix:           "KVAS2_",
 		TargetDNSServerAddress: "127.0.0.1:53",
 		ListenPort:             7548,
 	})