diff --git a/internal/aghalg/aghalg.go b/internal/aghalg/aghalg.go
index 4705173e034..c3b6e906fe6 100644
--- a/internal/aghalg/aghalg.go
+++ b/internal/aghalg/aghalg.go
@@ -18,16 +18,16 @@ type comparable = interface{}
 type UniqChecker map[comparable]int64
 
 // Add adds a value to the validator.  v must not be nil.
-func (v UniqChecker) Add(elems ...comparable) {
+func (uc UniqChecker) Add(elems ...comparable) {
 	for _, e := range elems {
-		v[e]++
+		uc[e]++
 	}
 }
 
 // Merge returns a validator containing data from both v and other.
-func (v UniqChecker) Merge(other UniqChecker) (merged UniqChecker) {
-	merged = make(UniqChecker, len(v)+len(other))
-	for elem, num := range v {
+func (uc UniqChecker) Merge(other UniqChecker) (merged UniqChecker) {
+	merged = make(UniqChecker, len(uc)+len(other))
+	for elem, num := range uc {
 		merged[elem] += num
 	}
 
@@ -41,9 +41,9 @@ func (v UniqChecker) Merge(other UniqChecker) (merged UniqChecker) {
 // Validate returns an error enumerating all elements that aren't unique.
 // isBefore is an optional sorting function to make the error message
 // deterministic.
-func (v UniqChecker) Validate(isBefore func(a, b comparable) (less bool)) (err error) {
+func (uc UniqChecker) Validate(isBefore func(a, b comparable) (less bool)) (err error) {
 	var dup []comparable
-	for elem, num := range v {
+	for elem, num := range uc {
 		if num > 1 {
 			dup = append(dup, elem)
 		}
@@ -62,13 +62,13 @@ func (v UniqChecker) Validate(isBefore func(a, b comparable) (less bool)) (err e
 	return fmt.Errorf("duplicated values: %v", dup)
 }
 
-// IntIsBefore is a helper sort function for UniquenessValidator.Validate.
+// IntIsBefore is a helper sort function for UniqChecker.Validate.
 // a and b must be of type int.
 func IntIsBefore(a, b comparable) (less bool) {
 	return a.(int) < b.(int)
 }
 
-// StringIsBefore is a helper sort function for UniquenessValidator.Validate.
+// StringIsBefore is a helper sort function for UniqChecker.Validate.
 // a and b must be of type string.
 func StringIsBefore(a, b comparable) (less bool) {
 	return a.(string) < b.(string)
diff --git a/internal/dnsforward/access.go b/internal/dnsforward/access.go
index 72f4771b058..76145fdfee5 100644
--- a/internal/dnsforward/access.go
+++ b/internal/dnsforward/access.go
@@ -223,13 +223,13 @@ func validateAccessSet(list *accessListJSON) (err error) {
 }
 
 // validateStrUniq returns an informative error if clients are not unique.
-func validateStrUniq(clients []string) (uv aghalg.UniqChecker, err error) {
-	uv = make(aghalg.UniqChecker, len(clients))
+func validateStrUniq(clients []string) (uc aghalg.UniqChecker, err error) {
+	uc = make(aghalg.UniqChecker, len(clients))
 	for _, c := range clients {
-		uv.Add(c)
+		uc.Add(c)
 	}
 
-	return uv, uv.Validate(aghalg.StringIsBefore)
+	return uc, uc.Validate(aghalg.StringIsBefore)
 }
 
 func (s *Server) handleAccessSet(w http.ResponseWriter, r *http.Request) {
diff --git a/internal/home/config.go b/internal/home/config.go
index 5823b074eb4..a624716441e 100644
--- a/internal/home/config.go
+++ b/internal/home/config.go
@@ -288,9 +288,9 @@ func parseConfig() (err error) {
 		return err
 	}
 
-	uv := aghalg.UniqChecker{}
+	uc := aghalg.UniqChecker{}
 	addPorts(
-		uv,
+		uc,
 		config.BindPort,
 		config.BetaBindPort,
 		config.DNS.Port,
@@ -298,14 +298,14 @@ func parseConfig() (err error) {
 
 	if config.TLS.Enabled {
 		addPorts(
-			uv,
+			uc,
 			config.TLS.PortHTTPS,
 			config.TLS.PortDNSOverTLS,
 			config.TLS.PortDNSOverQUIC,
 			config.TLS.PortDNSCrypt,
 		)
 	}
-	if err = uv.Validate(aghalg.IntIsBefore); err != nil {
+	if err = uc.Validate(aghalg.IntIsBefore); err != nil {
 		return fmt.Errorf("validating ports: %w", err)
 	}
 
@@ -321,10 +321,10 @@ func parseConfig() (err error) {
 }
 
 // addPorts is a helper for ports validation.  It skips zero ports.
-func addPorts(uv aghalg.UniqChecker, ports ...int) {
+func addPorts(uc aghalg.UniqChecker, ports ...int) {
 	for _, p := range ports {
 		if p != 0 {
-			uv.Add(p)
+			uc.Add(p)
 		}
 	}
 }
diff --git a/internal/home/controlinstall.go b/internal/home/controlinstall.go
index 4cff68047b8..cd13edd8ebc 100644
--- a/internal/home/controlinstall.go
+++ b/internal/home/controlinstall.go
@@ -104,14 +104,14 @@ type checkConfResp struct {
 
 // validateWeb returns error is the web part if the initial configuration can't
 // be set.
-func (req *checkConfReq) validateWeb(uv aghalg.UniqChecker) (err error) {
+func (req *checkConfReq) validateWeb(uc aghalg.UniqChecker) (err error) {
 	defer func() { err = errors.Annotate(err, "validating ports: %w") }()
 
 	port := req.Web.Port
-	addPorts(uv, config.BetaBindPort, port)
-	if err = uv.Validate(aghalg.IntIsBefore); err != nil {
+	addPorts(uc, config.BetaBindPort, port)
+	if err = uc.Validate(aghalg.IntIsBefore); err != nil {
 		// Avoid duplicating the error into the status of DNS.
-		uv[port] = 1
+		uc[port] = 1
 
 		return err
 	}
@@ -130,12 +130,12 @@ func (req *checkConfReq) validateWeb(uv aghalg.UniqChecker) (err error) {
 // validateDNS returns error if the DNS part of the initial configuration can't
 // be set.  autofix is true if the port can be unbound by AdGuard Home
 // automatically.
-func (req *checkConfReq) validateDNS(uv aghalg.UniqChecker) (canAutofix bool, err error) {
+func (req *checkConfReq) validateDNS(uc aghalg.UniqChecker) (canAutofix bool, err error) {
 	defer func() { err = errors.Annotate(err, "validating ports: %w") }()
 
 	port := req.DNS.Port
-	addPorts(uv, port)
-	if err = uv.Validate(aghalg.IntIsBefore); err != nil {
+	addPorts(uc, port)
+	if err = uc.Validate(aghalg.IntIsBefore); err != nil {
 		return false, err
 	}
 
@@ -184,13 +184,13 @@ func (web *Web) handleInstallCheckConfig(w http.ResponseWriter, r *http.Request)
 	}
 
 	resp := &checkConfResp{}
-	uv := aghalg.UniqChecker{}
+	uc := aghalg.UniqChecker{}
 
-	if err = req.validateWeb(uv); err != nil {
+	if err = req.validateWeb(uc); err != nil {
 		resp.Web.Status = err.Error()
 	}
 
-	if resp.DNS.CanAutofix, err = req.validateDNS(uv); err != nil {
+	if resp.DNS.CanAutofix, err = req.validateDNS(uc); err != nil {
 		resp.DNS.Status = err.Error()
 	} else if !req.DNS.IP.IsUnspecified() {
 		resp.StaticIP = handleStaticIP(req.DNS.IP, req.SetStaticIP)
diff --git a/internal/home/home.go b/internal/home/home.go
index 57dae6326f8..90674d481f6 100644
--- a/internal/home/home.go
+++ b/internal/home/home.go
@@ -296,23 +296,23 @@ func setupConfig(args options) (err error) {
 	Context.clients.Init(config.Clients, Context.dhcpServer, Context.etcHosts)
 
 	if args.bindPort != 0 {
-		uv := aghalg.UniqChecker{}
+		uc := aghalg.UniqChecker{}
 		addPorts(
-			uv,
+			uc,
 			args.bindPort,
 			config.BetaBindPort,
 			config.DNS.Port,
 		)
 		if config.TLS.Enabled {
 			addPorts(
-				uv,
+				uc,
 				config.TLS.PortHTTPS,
 				config.TLS.PortDNSOverTLS,
 				config.TLS.PortDNSOverQUIC,
 				config.TLS.PortDNSCrypt,
 			)
 		}
-		if err = uv.Validate(aghalg.IntIsBefore); err != nil {
+		if err = uc.Validate(aghalg.IntIsBefore); err != nil {
 			return fmt.Errorf("validating ports: %w", err)
 		}
 
diff --git a/internal/home/tls.go b/internal/home/tls.go
index d5ffc4f4b29..a201be1440b 100644
--- a/internal/home/tls.go
+++ b/internal/home/tls.go
@@ -251,9 +251,9 @@ func (t *TLSMod) handleTLSValidate(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if setts.Enabled {
-		uv := aghalg.UniqChecker{}
+		uc := aghalg.UniqChecker{}
 		addPorts(
-			uv,
+			uc,
 			config.BindPort,
 			config.BetaBindPort,
 			config.DNS.Port,
@@ -263,7 +263,7 @@ func (t *TLSMod) handleTLSValidate(w http.ResponseWriter, r *http.Request) {
 			setts.PortDNSCrypt,
 		)
 
-		err = uv.Validate(aghalg.IntIsBefore)
+		err = uc.Validate(aghalg.IntIsBefore)
 		if err != nil {
 			aghhttp.Error(r, w, http.StatusBadRequest, "validating ports: %s", err)
 
@@ -344,9 +344,9 @@ func (t *TLSMod) handleTLSConfigure(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if data.Enabled {
-		uv := aghalg.UniqChecker{}
+		uc := aghalg.UniqChecker{}
 		addPorts(
-			uv,
+			uc,
 			config.BindPort,
 			config.BetaBindPort,
 			config.DNS.Port,
@@ -356,7 +356,7 @@ func (t *TLSMod) handleTLSConfigure(w http.ResponseWriter, r *http.Request) {
 			data.PortDNSCrypt,
 		)
 
-		err = uv.Validate(aghalg.IntIsBefore)
+		err = uc.Validate(aghalg.IntIsBefore)
 		if err != nil {
 			aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)