diff --git a/sys/dev/if_wg/module/if_wg_session.c b/sys/dev/if_wg/module/if_wg_session.c
--- a/sys/dev/if_wg/module/if_wg_session.c
+++ b/sys/dev/if_wg/module/if_wg_session.c
@@ -1394,8 +1394,8 @@
 			CURVNET_SET(inp->inp_vnet);
 			ip_input(m);
 			CURVNET_RESTORE();
-		}	else if (version == 6) {
-			af = AF_INET;
+		} else if (version == 6) {
+			af = AF_INET6;
 			BPF_MTAP2(sc->sc_ifp, &af, sizeof(af), m);
 			inp = sotoinpcb(so->so_so6);
 			CURVNET_SET(inp->inp_vnet);
@@ -1531,6 +1531,7 @@
 		peer = CONTAINER_OF(remote, struct wg_peer, p_remote);
 		DPRINTF(sc, "Receiving handshake initiation from peer %llu\n",
 		    (unsigned long long)peer->p_id);
+		wg_peer_set_endpoint_from_tag(peer, t);
 		res = wg_send_response(peer);
 		if (res == 0 && noise_remote_begin_session(&peer->p_remote) == 0)
 			wg_timers_event_session_derived(&peer->p_timers);
@@ -1851,6 +1852,40 @@
 	SLIST_INSERT_HEAD(&peer->p_unused_index, iter, i_unused_entry);
 }
 
+static int
+wg_update_endpoint_addrs(struct wg_endpoint *e, const struct sockaddr *srcsa,
+    struct ifnet *rcvif)
+{
+	const struct sockaddr_in *sa4;
+	const struct sockaddr_in6 *sa6;
+	int ret = 0;
+
+	/*
+	 * UDP passes a 2-element sockaddr array: first element is the
+	 * source addr/port, second the destination addr/port.
+	 */
+	if (srcsa->sa_family == AF_INET) {
+		sa4 = (const struct sockaddr_in *)srcsa;
+		e->e_remote.r_sin = sa4[0];
+		/* Only update dest if not mcast/bcast */
+		if (!(IN_MULTICAST(ntohl(sa4[1].sin_addr.s_addr)) ||
+		      sa4[1].sin_addr.s_addr == INADDR_BROADCAST ||
+		      in_broadcast(sa4[1].sin_addr, rcvif))) {
+			e->e_local.l_in = sa4[1].sin_addr;
+		}
+	} else if (srcsa->sa_family == AF_INET6) {
+		sa6 = (const struct sockaddr_in6 *)srcsa;
+		e->e_remote.r_sin6 = sa6[0];
+		/* Only update dest if not multicast */
+		if (!IN6_IS_ADDR_MULTICAST(&sa6[1].sin6_addr))
+			e->e_local.l_in6 = sa6[1].sin6_addr;
+	} else {
+		ret = EAFNOSUPPORT;
+	}
+
+	return (ret);
+}
+
 static void
 wg_input(struct mbuf *m0, int offset, struct inpcb *inpcb,
 		 const struct sockaddr *srcsa, void *_sc)
@@ -1882,7 +1917,11 @@
 		goto free;
 	}
 	e = wg_mbuf_endpoint_get(m);
-	e->e_remote.r_sa = *srcsa;
+
+	if (wg_update_endpoint_addrs(e, srcsa, m->m_pkthdr.rcvif)) {
+		DPRINTF(sc, "unknown family\n");
+		goto free;
+	}
 	verify_endpoint(m);
 
 	if_inc_counter(sc->sc_ifp, IFCOUNTER_IPACKETS, 1);
diff --git a/sys/dev/if_wg/module/module.c b/sys/dev/if_wg/module/module.c
--- a/sys/dev/if_wg/module/module.c
+++ b/sys/dev/if_wg/module/module.c
@@ -255,7 +255,6 @@
 	peer = wg_route_lookup(&sc->sc_routes, m, OUT);
 	if (__predict_false(peer == NULL)) {
 		rc = ENOKEY;
-		printf("peer not found - dropping %p\n", m);
 		/* XXX log */
 		goto err;
 	}
@@ -360,8 +359,15 @@
 	struct wg_softc *sc;
 	int rc;
 
+	if (iflib_in_detach(ctx))
+		return;
+
 	sc = iflib_get_softc(ctx);
 	ifp = iflib_get_ifp(ctx);
+	if (sc->sc_socket.so_so4 != NULL)
+		printf("XXX wg_init, socket non-NULL %p\n",
+		    sc->sc_socket.so_so4);
+	wg_socket_reinit(sc, NULL, NULL);
 	rc = wg_socket_init(sc);
 	if (rc)
 		return;
@@ -377,6 +383,7 @@
 	sc  = iflib_get_softc(ctx);
 	ifp = iflib_get_ifp(ctx);
 	if_link_state_change(ifp, LINK_STATE_DOWN);
+	wg_socket_reinit(sc, NULL, NULL);
 }
 
 static nvlist_t *
@@ -386,13 +393,20 @@
 	int i, count;
 	nvlist_t *nvl;
 	caddr_t key;
+	size_t sa_sz;
 	struct wg_allowedip *aip;
+	struct wg_endpoint *ep;
 
 	if ((nvl = nvlist_create(0)) == NULL)
 		return (NULL);
 	key = peer->p_remote.r_public;
 	nvlist_add_binary(nvl, "public-key", key, WG_KEY_SIZE);
-	nvlist_add_binary(nvl, "endpoint", &peer->p_endpoint.e_remote, sizeof(struct sockaddr));
+	ep = &peer->p_endpoint;
+	if (ep->e_remote.r_sa.sa_family != 0) {
+		sa_sz = (ep->e_remote.r_sa.sa_family == AF_INET) ?
+			sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6);
+		nvlist_add_binary(nvl, "endpoint", &ep->e_remote, sa_sz);
+	}
 	i = count = 0;
 	CK_LIST_FOREACH(rt, &peer->p_routes, r_entry) {
 		count++;
@@ -587,13 +601,12 @@
 	}
 	if (nvlist_exists_binary(nvl, "endpoint")) {
 		endpoint = nvlist_get_binary(nvl, "endpoint", &size);
-		if (size != sizeof(*endpoint)) {
+		if (size > sizeof(peer->p_endpoint.e_remote)) {
 			device_printf(dev, "%s bad length for endpoint %zu\n", __func__, size);
 			err = EBADMSG;
 			goto out;
 		}
-		memcpy(&peer->p_endpoint.e_remote, endpoint,
-		    sizeof(peer->p_endpoint.e_remote));
+		memcpy(&peer->p_endpoint.e_remote, endpoint, size);
 	}
 	if (nvlist_exists_binary(nvl, "pre-shared-key")) {
 		const void *key;