diff --git a/include/lwipopts.h b/include/lwipopts.h
index 74e5bc9..51b334c 100644
--- a/include/lwipopts.h
+++ b/include/lwipopts.h
@@ -110,7 +110,7 @@
 #define LWIP_DBG_MIN_LEVEL              LWIP_DBG_LEVEL_ALL
 #define LWIP_DBG_TYPES_ON               LWIP_DBG_ON
 
-#define ETHARP_DEBUG                    LWIP_DBG_ON
+#define ETHARP_DEBUG                    LWIP_DBG_OFF
 
 // interfaces
 #define SLIP_DEBUG                      LWIP_DBG_OFF
@@ -129,28 +129,28 @@
 #define MEM_DEBUG                       LWIP_DBG_ON
 #define MEMP_DEBUG                      LWIP_DBG_ON
 // system
-#define SYS_DEBUG                       LWIP_DBG_OFF
+#define SYS_DEBUG                       LWIP_DBG_ON
 #define TIMERS_DEBUG                    LWIP_DBG_OFF
 // TCP
 #define TCP_DEBUG_TMR					LWIP_DBG_OFF // not standard in lwIP, added for debugging convenience
-#define TCP_DEBUG                       LWIP_DBG_ON
-#define TCP_INPUT_DEBUG                 LWIP_DBG_ON
+#define TCP_DEBUG                       LWIP_DBG_OFF
+#define TCP_INPUT_DEBUG                 LWIP_DBG_OFF
 #define TCP_FR_DEBUG                    LWIP_DBG_OFF
 #define TCP_RTO_DEBUG                   LWIP_DBG_OFF
 #define TCP_CWND_DEBUG                  LWIP_DBG_OFF
 #define TCP_WND_DEBUG                   LWIP_DBG_OFF
-#define TCP_OUTPUT_DEBUG                LWIP_DBG_ON
+#define TCP_OUTPUT_DEBUG                LWIP_DBG_OFF
 #define TCP_RST_DEBUG                   LWIP_DBG_OFF
 #define TCP_QLEN_DEBUG                  LWIP_DBG_OFF
 // IP
 #define AUTOIP_DEBUG                    LWIP_DBG_OFF
-#define IP_DEBUG                        LWIP_DBG_ON
+#define IP_DEBUG                        LWIP_DBG_OFF
 #define IP_REASS_DEBUG                  LWIP_DBG_OFF
-#define IP6_DEBUG                       LWIP_DBG_ON
+#define IP6_DEBUG                       LWIP_DBG_OFF
 // TCP/IP
 #define TCPIP_DEBUG                     LWIP_DBG_OFF
 // UDP
-#define UDP_DEBUG                       LWIP_DBG_ON
+#define UDP_DEBUG                       LWIP_DBG_OFF
 // services
 #define DHCP_DEBUG                      LWIP_DBG_OFF
 #define DNS_DEBUG                       LWIP_DBG_OFF
diff --git a/test/selftest.cpp b/test/selftest.cpp
index d32b07e..3161330 100644
--- a/test/selftest.cpp
+++ b/test/selftest.cpp
@@ -589,6 +589,7 @@ void tcp_select_client(TCP_UNIT_TEST_SIG_4)
 	memset(rbuf, 0, sizeof rbuf);
 	if ((fd = _SOCKET(AF_INET, SOCK_STREAM, 0)) < 0) {
 		DEBUG_ERROR("error creating ZeroTier socket");
+		exit(0);		
 		perror("socket");
 		*passed = false;
 		return;
@@ -681,6 +682,7 @@ void tcp_client_4(TCP_UNIT_TEST_SIG_4)
 	memset(rbuf, 0, sizeof rbuf);
 	if ((fd = _SOCKET(AF_INET, SOCK_STREAM, 0)) < 0) {
 		DEBUG_ERROR("error creating ZeroTier socket");
+		exit(0);	
 		perror("socket");
 		*passed = false;
 		return;
@@ -736,6 +738,7 @@ void tcp_server_4(TCP_UNIT_TEST_SIG_4)
 	memset(rbuf, 0, sizeof rbuf);
 	if ((fd = _SOCKET(AF_INET, SOCK_STREAM, 0)) < 0) {
 		DEBUG_ERROR("error creating ZeroTier socket");
+		exit(0);
 		perror("socket");
 		*passed = false;
 		return;
@@ -805,6 +808,7 @@ void tcp_client_6(TCP_UNIT_TEST_SIG_6)
 	memset(rbuf, 0, sizeof rbuf);
 	if ((fd = _SOCKET(AF_INET6, SOCK_STREAM, 0)) < 0) {
 		DEBUG_ERROR("error creating ZeroTier socket");
+		exit(0);
 		perror("socket");
 		*passed = false;
 		return;
@@ -860,6 +864,7 @@ void tcp_server_6(TCP_UNIT_TEST_SIG_6)
 	memset(rbuf, 0, sizeof rbuf);
 	if ((fd = _SOCKET(AF_INET6, SOCK_STREAM, 0)) < 0) { 
 		DEBUG_ERROR("error creating ZeroTier socket");
+		exit(0);
 		perror("socket");
 		*passed = false;
 		return;
@@ -933,6 +938,7 @@ void udp_client_4(UDP_UNIT_TEST_SIG_4)
 	memset(rbuf, 0, sizeof rbuf);
 	if ((fd = _SOCKET(AF_INET, SOCK_DGRAM, 0)) < 0) {
 		DEBUG_ERROR("error creating ZeroTier socket");
+		exit(0);
 		perror("socket");
 		*passed = false;
 		return;
@@ -984,6 +990,7 @@ void udp_server_4(UDP_UNIT_TEST_SIG_4)
 	memset(rbuf, 0, sizeof rbuf);
 	if ((fd = _SOCKET(AF_INET, SOCK_DGRAM, 0)) < 0) {
 		DEBUG_ERROR("error creating ZeroTier socket");
+		exit(0);
 		perror("socket");
 		*passed = false;
 		return;
@@ -1061,6 +1068,7 @@ void udp_client_6(UDP_UNIT_TEST_SIG_6)
 
 	if ((fd = _SOCKET(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 		DEBUG_ERROR("error creating ZeroTier socket");
+		exit(0);
 		perror("socket");
 		*passed = false;
 		return;
@@ -1112,7 +1120,8 @@ void udp_server_6(UDP_UNIT_TEST_SIG_6)
 	memset(rbuf, 0, sizeof rbuf);
 
 	if ((fd = _SOCKET(AF_INET6, SOCK_DGRAM, 0)) < 0) {
-		DEBUG_ERROR("error creating socket");
+		DEBUG_ERROR("error creating ZeroTier socket");
+		exit(0);
 		perror("socket");
 		*passed = false;
 		return;
@@ -1188,6 +1197,7 @@ void tcp_client_sustained_4(TCP_UNIT_TEST_SIG_4)
 
 	if ((fd = _SOCKET(AF_INET, SOCK_STREAM, 0)) < 0) {
 		DEBUG_ERROR("error creating ZeroTier socket");
+		exit(0);
 		perror("socket");
 		*passed = false;
 		return;
@@ -1281,6 +1291,7 @@ void tcp_client_sustained_6(TCP_UNIT_TEST_SIG_6)
 	generate_random_data(txbuf, cnt, 0, 9);
 	if ((fd = _SOCKET(AF_INET6, SOCK_STREAM, 0)) < 0){
 		DEBUG_ERROR("error creating ZeroTier socket");
+		exit(0);
 		perror("socket");
 		*passed = false;
 		return;
@@ -1369,6 +1380,7 @@ void tcp_server_sustained_4(TCP_UNIT_TEST_SIG_4)
 
 	if ((fd = _SOCKET(AF_INET, SOCK_STREAM, 0)) < 0) {
 		DEBUG_ERROR("error creating ZeroTier socket");
+		exit(0);
 		perror("socket");
 		*passed = false;
 		return;
@@ -1461,6 +1473,7 @@ void tcp_server_sustained_6(TCP_UNIT_TEST_SIG_6)
 
 	if ((fd = _SOCKET(AF_INET6, SOCK_STREAM, 0)) < 0) {
 		DEBUG_ERROR("error creating ZeroTier socket");
+		exit(0);
 		perror("socket");
 		*passed = false;
 		return;
@@ -1556,6 +1569,7 @@ void udp_client_sustained_4(UDP_UNIT_TEST_SIG_4)
 	memset(rbuf, 0, sizeof rbuf);
 	if ((fd = _SOCKET(AF_INET, SOCK_DGRAM, 0)) < 0) {
 		DEBUG_ERROR("error creating ZeroTier socket");
+		exit(0);
 		perror("socket");
 		*passed = false;
 		return;
@@ -1647,6 +1661,7 @@ void udp_client_sustained_6(UDP_UNIT_TEST_SIG_6)
 	memset(rbuf, 0, sizeof rbuf);
 	if ((fd = _SOCKET(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 		DEBUG_ERROR("error creating ZeroTier socket");
+		exit(0);
 		perror("socket");
 		*passed = false;
 		return;