diff --git a/.gitignore b/.gitignore
index 851ee33..9de2f2a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,8 +6,10 @@
 *.so
 *.so.*
 utun
+
+# binary files
 *.exe
-*[^.]* # binaries
+**/*[^.]
 
 # Autotools
 Makefile
diff --git a/src/config_parser.c b/src/config_parser.c
index efd01a9..a6330d5 100644
--- a/src/config_parser.c
+++ b/src/config_parser.c
@@ -379,6 +379,12 @@ static int parse_server(const char *key, const char *value, struct CFG_SERVER *s
         srv->mtu = atoi(value);
         return 0;
     }
+    if (strcmp(key, "loss_rate") == 0) {
+        srv->loss_rate = atoi(value);
+        if (srv->loss_rate < 0) srv->loss_rate = 0;
+        if (srv->loss_rate > 100) srv->loss_rate = 100;
+        return 0;
+    }
     return 0;
 }
 
@@ -658,9 +664,9 @@ void print_config(const struct utun_config *cfg) {
     struct CFG_SERVER *s = cfg->servers;
     while (s) {
         struct sockaddr_in *sin = (struct sockaddr_in *)&s->ip;
-        DEBUG_INFO(DEBUG_CATEGORY_CONFIG, "  %s: %s:%d (mark=%d, netif=%u, type=%u, mtu=%d)",
+        DEBUG_INFO(DEBUG_CATEGORY_CONFIG, "  %s: %s:%d (mark=%d, netif=%u, type=%u, mtu=%d, loss_rate=%d%%)",
                    s->name, ip_to_str(&sin->sin_addr, AF_INET).str, ntohs(sin->sin_port),
-                   s->so_mark, s->netif_index, s->type, s->mtu);
+                   s->so_mark, s->netif_index, s->type, s->mtu, s->loss_rate);
         s = s->next;
     }
     
diff --git a/src/config_parser.h b/src/config_parser.h
index 45b05f7..0fb2ac7 100644
--- a/src/config_parser.h
+++ b/src/config_parser.h
@@ -35,6 +35,7 @@ struct CFG_SERVER {
     int so_mark;
     uint8_t type;  // public/nat/private
     int mtu;
+    int loss_rate;  // packet loss rate in percent (0-100), default 0
 };
 
 struct CFG_CLIENT_LINK {
diff --git a/src/etcp_connections.c b/src/etcp_connections.c
index f3b6558..f27c8c8 100644
--- a/src/etcp_connections.c
+++ b/src/etcp_connections.c
@@ -374,7 +374,7 @@ int etcp_find_free_local_link_id(struct ETCP_CONN* etcp) {
 
 // ===============================
 
-struct ETCP_SOCKET* etcp_socket_add(struct UTUN_INSTANCE* instance, struct sockaddr_storage* ip, uint32_t netif_index, int so_mark, uint8_t type, int mtu) {
+struct ETCP_SOCKET* etcp_socket_add(struct UTUN_INSTANCE* instance, struct sockaddr_storage* ip, uint32_t netif_index, int so_mark, uint8_t type, int mtu, int loss_rate) {
     DEBUG_TRACE(DEBUG_CATEGORY_CONNECTION, "");
     if (!instance) return NULL;
     
@@ -456,6 +456,7 @@ struct ETCP_SOCKET* etcp_socket_add(struct UTUN_INSTANCE* instance, struct socka
     e_sock->pkt_format_errors = 0;
     e_sock->type = type;
     e_sock->mtu = mtu;
+    e_sock->loss_rate = loss_rate;
     DEBUG_INFO(DEBUG_CATEGORY_BGP, "Add Socket type=%d", type);
     
     // Add to instance's socket list
@@ -655,9 +656,17 @@ int etcp_encrypt_send(struct ETCP_DGRAM* dgram) {
         struct sockaddr_in* sin = (struct sockaddr_in*)addr;
         // inet_ntop removed - use ip_to_str
     }
-    
-    ssize_t sent = socket_sendto(dgram->link->conn->fd, enc_buf, enc_buf_len + dgram->noencrypt_len,
+
+    ssize_t sent=-1;
+    int loss_rate = dgram->link->conn->loss_rate;
+    int rnd = rand() % 100;
+    if (loss_rate == 0 || rnd >= loss_rate) {
+    sent = socket_sendto(dgram->link->conn->fd, enc_buf, enc_buf_len + dgram->noencrypt_len,
                                  (struct sockaddr*)addr, addr_len);
+    } else {
+        DEBUG_WARN(DEBUG_CATEGORY_ETCP, "[%s] Packet dropped by loss_rate (rnd=%d, loss_rate=%d%%)", 
+                   dgram->link->etcp->log_name, rnd, loss_rate);
+    }
     if (sent < 0) { 
         DEBUG_ERROR(DEBUG_CATEGORY_ETCP, "sendto failed, sock_err=%d", socket_get_error());
         dgram->link->send_errors++; errcode=4; goto es_err;
@@ -892,6 +901,7 @@ static void etcp_connections_read_callback_socket(socket_t sock, void* arg) {
 
     memory_pool_free(e_sock->instance->pkt_pool, pkt);
     link->initialized = 1;// получен init request (server), считаем линк уже готовым к работе
+    link->link_state = 3;  // connected
     if (link->etcp->initialized == 0) {
       etcp_conn_ready(link->etcp);
       }
@@ -1089,7 +1099,7 @@ int init_connections(struct UTUN_INSTANCE* instance) {
             }
         }
         
-        struct ETCP_SOCKET* e_sock = etcp_socket_add(instance, &server->ip, server->netif_index, server->so_mark, server->type, server->mtu ? server->mtu : instance->config->global.mtu);
+        struct ETCP_SOCKET* e_sock = etcp_socket_add(instance, &server->ip, server->netif_index, server->so_mark, server->type, server->mtu ? server->mtu : instance->config->global.mtu, server->loss_rate);
         if (e_sock && default_ip != 0) {
             struct in_addr addr;
             addr.s_addr = default_ip;
diff --git a/src/etcp_connections.h b/src/etcp_connections.h
index 4311abf..a1975c3 100644
--- a/src/etcp_connections.h
+++ b/src/etcp_connections.h
@@ -35,6 +35,7 @@ struct ETCP_SOCKET {
     socket_t fd;                        // UDP socket (cross-platform)
     struct sockaddr_storage local_addr; // Локальный адрес
     int mtu;                            // MTU для этого сокета
+    int loss_rate;                      // packet loss rate in percent (0-100)
     
     // для входящих подключений (links) - массив упорядоченный по ip_port_hash
     size_t max_channels;    // сколько выделено памяти
@@ -121,7 +122,7 @@ int init_connections(struct UTUN_INSTANCE* instance);
 
 // SOCKET FUNCTIONS
 // добавляет новый версер (сокет для приёма и отправки кодограмм. обслуживает много подключений)
-struct ETCP_SOCKET* etcp_socket_add(struct UTUN_INSTANCE* instance, struct sockaddr_storage* ip, uint32_t netif_index, int so_mark, uint8_t type, int mtu);
+struct ETCP_SOCKET* etcp_socket_add(struct UTUN_INSTANCE* instance, struct sockaddr_storage* ip, uint32_t netif_index, int so_mark, uint8_t type, int mtu, int loss_rate);
 // удаляет сокет и освобождает ресурсы (грохает все его подключения и сокет)
 void etcp_socket_remove(struct ETCP_SOCKET* conn);
 
diff --git a/tests/test_u_async_timeouts.c b/tests/test_u_async_timeouts.c
index e6c909a..8847c01 100644
--- a/tests/test_u_async_timeouts.c
+++ b/tests/test_u_async_timeouts.c
@@ -11,7 +11,7 @@
 #define DEBUG_CATEGORY_TEST 1
 
 #define TIMER_COUNT 100
-#define STOP_TIMEOUT_TB 100000  /* 10 seconds in 0.1ms units */
+#define STOP_TIMEOUT_TB 10000  /* 1 seconds in 0.1ms units */
 
 typedef struct {
     int timer_number;       /* номер таймера 0-99 */