diff --git a/internal/client/difft b/internal/client/difft
new file mode 100644
index 00000000..e69de29b
diff --git a/internal/client/storage.go b/internal/client/storage.go
index 18d1bdda..473acf76 100644
--- a/internal/client/storage.go
+++ b/internal/client/storage.go
@@ -1,7 +1,6 @@
 package client
 
 import (
-	"cmp"
 	"context"
 	"fmt"
 	"net"
@@ -9,7 +8,6 @@ import (
 	"sync"
 	"time"
 
-	"github.com/AdguardTeam/AdGuardHome/internal/aghnet"
 	"github.com/AdguardTeam/AdGuardHome/internal/arpdb"
 	"github.com/AdguardTeam/AdGuardHome/internal/dhcpsvc"
 	"github.com/AdguardTeam/AdGuardHome/internal/whois"
@@ -19,6 +17,33 @@ import (
 	"github.com/AdguardTeam/golibs/log"
 )
 
+// Tags is the list of available client tags.
+var Tags = []string{
+	"device_audio",
+	"device_camera",
+	"device_gameconsole",
+	"device_laptop",
+	"device_nas", // Network-attached Storage
+	"device_other",
+	"device_pc",
+	"device_phone",
+	"device_printer",
+	"device_securityalarm",
+	"device_tablet",
+	"device_tv",
+
+	"os_android",
+	"os_ios",
+	"os_linux",
+	"os_macos",
+	"os_other",
+	"os_windows",
+
+	"user_admin",
+	"user_child",
+	"user_regular",
+}
+
 // DHCP is an interface for accessing DHCP lease data the [Storage] needs.
 type DHCP interface {
 	// Leases returns all the DHCP leases.
@@ -35,20 +60,20 @@ type DHCP interface {
 	MACByIP(ip netip.Addr) (mac net.HardwareAddr)
 }
 
-// emptyDHCP is the empty [DHCP] implementation that does nothing.
-type emptyDHCP struct{}
+// EmptyDHCP is the empty [DHCP] implementation that does nothing.
+type EmptyDHCP struct{}
 
 // type check
-var _ DHCP = emptyDHCP{}
+var _ DHCP = EmptyDHCP{}
 
 // Leases implements the [DHCP] interface for emptyDHCP.
-func (emptyDHCP) Leases() (leases []*dhcpsvc.Lease) { return nil }
+func (EmptyDHCP) Leases() (leases []*dhcpsvc.Lease) { return nil }
 
 // HostByIP implements the [DHCP] interface for emptyDHCP.
-func (emptyDHCP) HostByIP(_ netip.Addr) (host string) { return "" }
+func (EmptyDHCP) HostByIP(_ netip.Addr) (host string) { return "" }
 
 // MACByIP implements the [DHCP] interface for emptyDHCP.
-func (emptyDHCP) MACByIP(_ netip.Addr) (mac net.HardwareAddr) { return nil }
+func (EmptyDHCP) MACByIP(_ netip.Addr) (mac net.HardwareAddr) { return nil }
 
 // HostsContainer is an interface for receiving updates to the system hosts
 // file.
@@ -56,9 +81,10 @@ type HostsContainer interface {
 	Upd() (updates <-chan *hostsfile.DefaultStorage)
 }
 
-// Config is the client storage configuration structure.
-type Config struct {
-	// DHCP is used to update [SourceDHCP] runtime client information.
+// StorageConfig is the client storage configuration structure.
+type StorageConfig struct {
+	// DHCP is used to update [SourceDHCP] runtime client information.  It must
+	// not be nil.
 	DHCP DHCP
 
 	// EtcHosts is used to update [SourceHostsFile] runtime client information.
@@ -67,9 +93,6 @@ type Config struct {
 	// ARPDB is used to update [SourceARP] runtime client information.
 	ARPDB arpdb.Interface
 
-	// AllowedTags is a list of all allowed client tags.
-	AllowedTags []string
-
 	// InitialClients is a list of persistent clients parsed from the
 	// configuration file.  Each client must not be nil.
 	InitialClients []*Persistent
@@ -111,14 +134,13 @@ type Storage struct {
 }
 
 // NewStorage returns initialized client storage.  conf must not be nil.
-func NewStorage(conf *Config) (s *Storage, err error) {
-	allowedTags := container.NewMapSet(conf.AllowedTags...)
+func NewStorage(conf *StorageConfig) (s *Storage, err error) {
 	s = &Storage{
-		allowedTags:            allowedTags,
+		allowedTags:            container.NewMapSet(Tags...),
 		mu:                     &sync.Mutex{},
 		index:                  newIndex(),
 		runtimeIndex:           newRuntimeIndex(),
-		dhcp:                   cmp.Or(conf.DHCP, DHCP(emptyDHCP{})),
+		dhcp:                   conf.DHCP,
 		etcHosts:               conf.EtcHosts,
 		arpDB:                  conf.ARPDB,
 		arpClientsUpdatePeriod: conf.ARPClientsUpdatePeriod,
@@ -132,16 +154,14 @@ func NewStorage(conf *Config) (s *Storage, err error) {
 		}
 	}
 
-	if hc, ok := s.etcHosts.(*aghnet.HostsContainer); ok && hc == nil {
-		s.etcHosts = nil
-	}
-
 	s.ReloadARP()
 
 	return s, nil
 }
 
 // Start starts the goroutines for updating the runtime client information.
+//
+// TODO(s.chzhen):  Pass context.
 func (s *Storage) Start(_ context.Context) (err error) {
 	go s.periodicARPUpdate()
 	go s.handleHostsUpdates()
@@ -150,6 +170,8 @@ func (s *Storage) Start(_ context.Context) (err error) {
 }
 
 // Shutdown gracefully stops the client storage.
+//
+// TODO(s.chzhen):  Pass context.
 func (s *Storage) Shutdown(_ context.Context) (err error) {
 	close(s.done)
 
diff --git a/internal/client/storage_test.go b/internal/client/storage_test.go
index ad6b7f9b..c5f09c22 100644
--- a/internal/client/storage_test.go
+++ b/internal/client/storage_test.go
@@ -109,7 +109,8 @@ func TestStorage_Add_hostsfile(t *testing.T) {
 		onUpd: func() (updates <-chan *hostsfile.DefaultStorage) { return hostCh },
 	}
 
-	storage, err := client.NewStorage(&client.Config{
+	storage, err := client.NewStorage(&client.StorageConfig{
+		DHCP:                   client.EmptyDHCP{},
 		EtcHosts:               h,
 		ARPClientsUpdatePeriod: testTimeout / 10,
 	})
@@ -196,7 +197,8 @@ func TestStorage_Add_arp(t *testing.T) {
 		},
 	}
 
-	storage, err := client.NewStorage(&client.Config{
+	storage, err := client.NewStorage(&client.StorageConfig{
+		DHCP:                   client.EmptyDHCP{},
 		ARPDB:                  a,
 		ARPClientsUpdatePeriod: testTimeout / 10,
 	})
@@ -270,7 +272,9 @@ func TestStorage_Add_whois(t *testing.T) {
 		cliName3 = "client_three"
 	)
 
-	storage, err := client.NewStorage(&client.Config{})
+	storage, err := client.NewStorage(&client.StorageConfig{
+		DHCP: client.EmptyDHCP{},
+	})
 	require.NoError(t, err)
 
 	whois := &whois.Info{
@@ -359,7 +363,7 @@ func TestClientsDHCP(t *testing.T) {
 		},
 	}
 
-	storage, err := client.NewStorage(&client.Config{
+	storage, err := client.NewStorage(&client.StorageConfig{
 		DHCP: d,
 	})
 	require.NoError(t, err)
@@ -431,7 +435,7 @@ func TestClientsAddExisting(t *testing.T) {
 	dhcpServer, err := dhcpd.Create(config)
 	require.NoError(t, err)
 
-	storage, err := client.NewStorage(&client.Config{
+	storage, err := client.NewStorage(&client.StorageConfig{
 		DHCP: dhcpServer,
 	})
 	require.NoError(t, err)
@@ -495,8 +499,8 @@ func TestClientsAddExisting(t *testing.T) {
 func newStorage(tb testing.TB, m []*client.Persistent) (s *client.Storage) {
 	tb.Helper()
 
-	s, err := client.NewStorage(&client.Config{
-		AllowedTags: nil,
+	s, err := client.NewStorage(&client.StorageConfig{
+		DHCP: client.EmptyDHCP{},
 	})
 	require.NoError(tb, err)
 
@@ -544,9 +548,7 @@ func TestStorage_Add(t *testing.T) {
 		UID:       existingClientUID,
 	}
 
-	s, err := client.NewStorage(&client.Config{
-		AllowedTags: []string{allowedTag},
-	})
+	s, err := client.NewStorage(&client.StorageConfig{})
 	require.NoError(t, err)
 
 	err = s.Add(existingClient)
@@ -637,9 +639,7 @@ func TestStorage_RemoveByName(t *testing.T) {
 		UID:  client.MustNewUID(),
 	}
 
-	s, err := client.NewStorage(&client.Config{
-		AllowedTags: nil,
-	})
+	s, err := client.NewStorage(&client.StorageConfig{})
 	require.NoError(t, err)
 
 	err = s.Add(existingClient)
@@ -666,9 +666,7 @@ func TestStorage_RemoveByName(t *testing.T) {
 	}
 
 	t.Run("duplicate_remove", func(t *testing.T) {
-		s, err = client.NewStorage(&client.Config{
-			AllowedTags: nil,
-		})
+		s, err = client.NewStorage(&client.StorageConfig{})
 		require.NoError(t, err)
 
 		err = s.Add(existingClient)
diff --git a/internal/home/clients.go b/internal/home/clients.go
index 60d7dafd..d7d4e628 100644
--- a/internal/home/clients.go
+++ b/internal/home/clients.go
@@ -95,15 +95,15 @@ func (clients *clientsContainer) Init(
 	// TODO(e.burkov):  The option should probably be returned, since hosts file
 	// currently used not only for clients' information enrichment, but also in
 	// the filtering module and upstream addresses resolution.
+	var EtcHosts client.HostsContainer = etcHosts
 	if !config.Clients.Sources.HostsFile {
-		etcHosts = nil
+		EtcHosts = nil
 	}
 
-	clients.storage, err = client.NewStorage(&client.Config{
-		AllowedTags:            clientTags,
+	clients.storage, err = client.NewStorage(&client.StorageConfig{
 		InitialClients:         confClients,
 		DHCP:                   dhcpServer,
-		EtcHosts:               etcHosts,
+		EtcHosts:               EtcHosts,
 		ARPDB:                  arpDB,
 		ARPClientsUpdatePeriod: arpClientsUpdatePeriod,
 	})
diff --git a/internal/home/clients_internal_test.go b/internal/home/clients_internal_test.go
index 927f9a32..c23f4b23 100644
--- a/internal/home/clients_internal_test.go
+++ b/internal/home/clients_internal_test.go
@@ -20,7 +20,7 @@ func newClientsContainer(t *testing.T) (c *clientsContainer) {
 		testing: true,
 	}
 
-	require.NoError(t, c.Init(nil, nil, nil, nil, &filtering.Config{}))
+	require.NoError(t, c.Init(nil, client.EmptyDHCP{}, nil, nil, &filtering.Config{}))
 
 	return c
 }
diff --git a/internal/home/clientshttp.go b/internal/home/clientshttp.go
index b6f27448..a977acc0 100644
--- a/internal/home/clientshttp.go
+++ b/internal/home/clientshttp.go
@@ -119,7 +119,7 @@ func (clients *clientsContainer) handleGetClients(w http.ResponseWriter, r *http
 		return true
 	})
 
-	data.Tags = clientTags
+	data.Tags = client.Tags
 
 	aghhttp.WriteJSONResponseOK(w, r, data)
 }
diff --git a/internal/home/clientstags.go b/internal/home/clientstags.go
deleted file mode 100644
index b4fc518a..00000000
--- a/internal/home/clientstags.go
+++ /dev/null
@@ -1,27 +0,0 @@
-package home
-
-var clientTags = []string{
-	"device_audio",
-	"device_camera",
-	"device_gameconsole",
-	"device_laptop",
-	"device_nas", // Network-attached Storage
-	"device_other",
-	"device_pc",
-	"device_phone",
-	"device_printer",
-	"device_securityalarm",
-	"device_tablet",
-	"device_tv",
-
-	"os_android",
-	"os_ios",
-	"os_linux",
-	"os_macos",
-	"os_other",
-	"os_windows",
-
-	"user_admin",
-	"user_child",
-	"user_regular",
-}
diff --git a/internal/home/dns_internal_test.go b/internal/home/dns_internal_test.go
index ca112e59..d3712890 100644
--- a/internal/home/dns_internal_test.go
+++ b/internal/home/dns_internal_test.go
@@ -18,9 +18,7 @@ var testIPv4 = netip.AddrFrom4([4]byte{1, 2, 3, 4})
 func newStorage(tb testing.TB, clients []*client.Persistent) (s *client.Storage) {
 	tb.Helper()
 
-	s, err := client.NewStorage(&client.Config{
-		AllowedTags: nil,
-	})
+	s, err := client.NewStorage(&client.StorageConfig{})
 	require.NoError(tb, err)
 
 	for _, p := range clients {