diff --git a/tpws/helpers.h b/tpws/helpers.h
index c0301c2..e2f1965 100644
--- a/tpws/helpers.h
+++ b/tpws/helpers.h
@@ -12,6 +12,7 @@
 // this saves memory. sockaddr_storage is larger than required. it can be 128 bytes. sockaddr_in6 is 28 bytes.
 typedef union
 {
+	sa_family_t sa_family;
 	struct sockaddr_in sa4;		// size 16
 	struct sockaddr_in6 sa6;	// size 28
 } sockaddr_in46;
diff --git a/tpws/tamper.c b/tpws/tamper.c
index 326445d..cd8f7ae 100644
--- a/tpws/tamper.c
+++ b/tpws/tamper.c
@@ -91,7 +91,7 @@ static void TLSDebug(const uint8_t *tls,size_t sz)
 	TLSDebugHandshake(tls+5,sz-5);
 }
 
-static bool ipcache_put_hostname(const struct in_addr *a4, const struct in6_addr *a6, const char *hostname)
+bool ipcache_put_hostname(const struct in_addr *a4, const struct in6_addr *a6, const char *hostname)
 {
 	if (!params.cache_hostname) return true;
 
@@ -101,13 +101,16 @@ static bool ipcache_put_hostname(const struct in_addr *a4, const struct in6_addr
 		DLOG_ERR("ipcache_put_hostname: out of memory\n");
 		return false;
 	}
-	free(ipc->hostname);
-	if (!(ipc->hostname = strdup(hostname)))
+	if (!ipc->hostname || strcmp(ipc->hostname,hostname))
 	{
-		DLOG_ERR("ipcache_put_hostname: out of memory\n");
-		return false;
+		free(ipc->hostname);
+		if (!(ipc->hostname = strdup(hostname)))
+		{
+			DLOG_ERR("ipcache_put_hostname: out of memory\n");
+			return false;
+		}
+		VPRINT("hostname cached: %s\n", hostname);
 	}
-	VPRINT("hostname cached: %s\n", hostname);
 	return true;
 }
 static bool ipcache_get_hostname(const struct in_addr *a4, const struct in6_addr *a6, char *hostname, size_t hostname_buf_len)
diff --git a/tpws/tamper.h b/tpws/tamper.h
index e0eb218..73bd88e 100644
--- a/tpws/tamper.h
+++ b/tpws/tamper.h
@@ -21,6 +21,7 @@ typedef struct
 } t_ctrack;
 
 void apply_desync_profile(t_ctrack *ctrack, const struct sockaddr *dest);
+bool ipcache_put_hostname(const struct in_addr *a4, const struct in6_addr *a6, const char *hostname);
 
 void tamper_out(t_ctrack *ctrack, const struct sockaddr *dest, uint8_t *segment,size_t segment_buffer_size,size_t *size, size_t *multisplit_pos, int *multisplit_count, uint8_t *split_flags);
 void tamper_in(t_ctrack *ctrack, const struct sockaddr *client, uint8_t *segment,size_t segment_buffer_size,size_t *size);
diff --git a/tpws/tpws_conn.c b/tpws/tpws_conn.c
index 06ffe5f..c1106de 100644
--- a/tpws/tpws_conn.c
+++ b/tpws/tpws_conn.c
@@ -494,6 +494,9 @@ static bool connect_remote_conn(tproxy_conn_t *conn)
 {
 	int mss=0;
 
+	if (conn->track.hostname)
+		if (!ipcache_put_hostname(conn->dest.sa_family==AF_INET ? &((struct sockaddr_in*)&conn->dest)->sin_addr : NULL, conn->dest.sa_family==AF_INET6 ? &((struct sockaddr_in6*)&conn->dest)->sin6_addr : NULL , conn->track.hostname))
+			DLOG_ERR("ipcache_put_hostname: out of memory");
 	apply_desync_profile(&conn->track, (struct sockaddr *)&conn->dest);
 
 	if (conn->track.dp && conn->track.dp->mss)
@@ -1087,7 +1090,8 @@ static bool resolve_complete(struct resolve_item *ri, struct tailhead *conn_list
 				if (!conn->track.hostname)
 				{
 					DBGPRINT("resolve_complete put hostname : %s\n", ri->dom);
-					conn->track.hostname = strdup(ri->dom);
+					if (!(conn->track.hostname = strdup(ri->dom)))
+						DLOG_ERR("dup hostname: out of memory\n");
 				}
 				sa46copy(&conn->dest, (struct sockaddr *)&ri->ss);
 				return proxy_mode_connect_remote(conn,conn_list);