diff --git a/vpn/iface/iface.go b/vpn/iface/iface.go
index 96908fc..521ee8c 100644
--- a/vpn/iface/iface.go
+++ b/vpn/iface/iface.go
@@ -28,8 +28,7 @@ var _ RoutingTable = (*TunInterface)(nil)
 type TunInterface struct {
 	dev        tun.Device
 	ifName     string
-	ipv6       *lru.Cache[string, []*net.IPNet]
-	ipv4       *lru.Cache[string, []*net.IPNet]
+	routing    *lru.Cache[string, []*net.IPNet]
 	peers      *lru.Cache[string, net.Addr]
 	peersMutex sync.RWMutex
 }
@@ -46,11 +45,10 @@ func Create(tunName string, cfg Config) (*TunInterface, error) {
 		link.SetupLink(tunName, cfg.IPv6)
 	}
 	return &TunInterface{
-		dev:    device,
-		ifName: tunName,
-		ipv6:   lru.New[string, []*net.IPNet](256),
-		ipv4:   lru.New[string, []*net.IPNet](256),
-		peers:  lru.New[string, net.Addr](1024),
+		dev:     device,
+		ifName:  tunName,
+		routing: lru.New[string, []*net.IPNet](512),
+		peers:   lru.New[string, net.Addr](1024),
 	}, nil
 }
 
@@ -62,18 +60,7 @@ func (r *TunInterface) GetPeer(ip string) (net.Addr, bool) {
 		return peerID, true
 	}
 	dstIP := net.ParseIP(ip)
-	if dstIP.To4() != nil {
-		k, _, _ := r.ipv4.Find(func(k string, v []*net.IPNet) bool {
-			for _, cidr := range v {
-				if cidr.Contains(dstIP) {
-					return true
-				}
-			}
-			return false
-		})
-		return r.peers.Get(k)
-	}
-	k, _, _ := r.ipv6.Find(func(k string, v []*net.IPNet) bool {
+	k, _, _ := r.routing.Find(func(k string, v []*net.IPNet) bool {
 		for _, cidr := range v {
 			if cidr.Contains(dstIP) {
 				return true
@@ -98,26 +85,14 @@ func (r *TunInterface) AddPeer(ipv4, ipv6 string, peer net.Addr) {
 func (r *TunInterface) AddRoute(cidr *net.IPNet, via net.IP) {
 	r.peersMutex.Lock()
 	defer r.peersMutex.Unlock()
-	var cidrs []*net.IPNet
-	if via.To4() != nil {
-		cidrs, _ = r.ipv4.Get(via.String())
-		for _, cmp := range cidrs {
-			if cmp.String() == cidr.String() {
-				return
-			}
+	cidrs, _ := r.routing.Get(via.String())
+	for _, cmp := range cidrs {
+		if cmp.String() == cidr.String() {
+			return
 		}
-		cidrs = append(cidrs, cidr)
-		r.ipv4.Put(via.String(), cidrs)
-	} else {
-		cidrs, _ := r.ipv6.Get(via.String())
-		for _, cmp := range cidrs {
-			if cmp.String() == cidr.String() {
-				return
-			}
-		}
-		cidrs = append(cidrs, cidr)
-		r.ipv6.Put(via.String(), cidrs)
 	}
+	cidrs = append(cidrs, cidr)
+	r.routing.Put(via.String(), cidrs)
 	r.updateRoute(via, cidrs[:len(cidrs)-1], cidrs)
 }
 
diff --git a/vpn/iface/iface_unix.go b/vpn/iface/iface_unix.go
index f7058a0..01f4088 100644
--- a/vpn/iface/iface_unix.go
+++ b/vpn/iface/iface_unix.go
@@ -22,9 +22,8 @@ func CreateFD(tunFD int, cfg Config) (*TunInterface, error) {
 		return nil, err
 	}
 	return &TunInterface{
-		dev:   device,
-		ipv6:  lru.New[string, []*net.IPNet](256),
-		ipv4:  lru.New[string, []*net.IPNet](256),
-		peers: lru.New[string, net.Addr](1024),
+		dev:     device,
+		routing: lru.New[string, []*net.IPNet](512),
+		peers:   lru.New[string, net.Addr](1024),
 	}, nil
 }