diff --git a/etc/defaults/npf.boot.conf b/etc/defaults/npf.boot.conf
index 89cca30b4f1a..253a99613379 100644
--- a/etc/defaults/npf.boot.conf
+++ b/etc/defaults/npf.boot.conf
@@ -1,4 +1,4 @@
-#	$NetBSD: npf.boot.conf,v 1.3 2020/08/09 23:43:58 gutteridge Exp $
+#	$NetBSD: npf.boot.conf,v 1.4 2024/05/03 20:48:58 nakayama Exp $
 #
 # /etc/defaults/npf.boot.conf --
 #	initial configuration for npf(7)
@@ -28,6 +28,8 @@ pass stateful out proto icmp icmp-type echo all
 # Allow DHCP
 pass out family inet4 proto udp from any port bootpc to any port bootps
 pass in family inet4 proto udp from any port bootps to any port bootpc
+pass out family inet6 proto udp from any port "dhcpv6-client" to any port "dhcpv6-server"
+pass in family inet6 proto udp from any port "dhcpv6-server" to any port "dhcpv6-client"
 
 # Allow IPv6 router/neighbor solicitation and advertisement.
 pass out  family inet6 proto ipv6-icmp icmp-type rtsol all