diff --git a/src/interfaces/IStrategy.h b/src/interfaces/IStrategy.h
index b7f5d65..660529e 100644
--- a/src/interfaces/IStrategy.h
+++ b/src/interfaces/IStrategy.h
@@ -41,6 +41,7 @@ public:
     virtual void connect()                          = 0;
     virtual void resume()                           = 0;
     virtual void stop()                             = 0;
+    virtual void tick(uint64_t now)                 = 0;
 };
 
 
diff --git a/src/log/Log.h b/src/log/Log.h
index 16e94e0..e193125 100644
--- a/src/log/Log.h
+++ b/src/log/Log.h
@@ -77,10 +77,14 @@ private:
 
 #ifdef APP_DEBUG
 #   define LOG_DEBUG(x, ...)      Log::i()->message(Log::DEBUG,   x, ##__VA_ARGS__)
+#else
+#   define LOG_DEBUG(x, ...)
+#endif
+
+#if defined(APP_DEBUG) || defined(APP_DEVEL)
 #   define LOG_DEBUG_ERR(x, ...)  Log::i()->message(Log::ERR,     x, ##__VA_ARGS__)
 #   define LOG_DEBUG_WARN(x, ...) Log::i()->message(Log::WARNING, x, ##__VA_ARGS__)
 #else
-#   define LOG_DEBUG(x, ...)
 #   define LOG_DEBUG_ERR(x, ...)
 #   define LOG_DEBUG_WARN(x, ...)
 #endif
diff --git a/src/net/Client.cpp b/src/net/Client.cpp
index bc44c7d..2c6e3ba 100644
--- a/src/net/Client.cpp
+++ b/src/net/Client.cpp
@@ -56,13 +56,14 @@ Client::Client(int id, const char *agent, IClientListener *listener) :
     m_failures(0),
     m_recvBufPos(0),
     m_state(UnconnectedState),
+    m_expire(0),
     m_stream(nullptr),
     m_socket(nullptr)
 {
     memset(m_ip, 0, sizeof(m_ip));
     memset(&m_hints, 0, sizeof(m_hints));
 
-    m_resolver.data = m_responseTimer.data = m_retriesTimer.data = m_keepAliveTimer.data = this;
+    m_resolver.data = this;
 
     m_hints.ai_family   = PF_INET;
     m_hints.ai_socktype = SOCK_STREAM;
@@ -71,10 +72,10 @@ Client::Client(int id, const char *agent, IClientListener *listener) :
     m_recvBuf.base = static_cast<char*>(malloc(kRecvBufSize));
     m_recvBuf.len  = kRecvBufSize;
 
-    auto loop = uv_default_loop();
-    uv_timer_init(loop, &m_retriesTimer);
-    uv_timer_init(loop, &m_responseTimer);
-    uv_timer_init(loop, &m_keepAliveTimer);
+#   ifndef XMRIG_PROXY_PROJECT
+    m_keepAliveTimer.data = this;
+    uv_timer_init(uv_default_loop(), &m_keepAliveTimer);
+#   endif
 }
 
 
@@ -93,7 +94,7 @@ Client::~Client()
 int64_t Client::send(char *data, size_t size)
 {
     LOG_DEBUG("[%s:%u] send (%d bytes): \"%s\"", m_url.host(), m_url.port(), size ? size : strlen(data), data);
-    if (state() != ConnectedState) {
+    if (state() != ConnectedState || !uv_is_writable(m_stream)) {
         LOG_DEBUG_ERR("[%s:%u] send failed, invalid state: %d", m_url.host(), m_url.port(), m_state);
         return -1;
     }
@@ -108,8 +109,7 @@ int64_t Client::send(char *data, size_t size)
         delete req;
     });
 
-    uv_timer_start(&m_responseTimer, [](uv_timer_t *handle) { getClient(handle->data)->close(); }, kResponseTimeout, 0);
-
+    m_expire = uv_now(uv_default_loop()) + kResponseTimeout;
     return m_sequence++;
 }
 
@@ -134,9 +134,11 @@ void Client::connect(const Url *url)
 
 void Client::disconnect()
 {
+#   ifndef XMRIG_PROXY_PROJECT
     uv_timer_stop(&m_keepAliveTimer);
-    uv_timer_stop(&m_responseTimer);
-    uv_timer_stop(&m_retriesTimer);
+#   endif
+
+    m_expire   = 0;
     m_failures = -1;
 
     close();
@@ -153,6 +155,24 @@ void Client::setUrl(const Url *url)
 }
 
 
+void Client::tick(uint64_t now)
+{
+    if (m_expire == 0 || now < m_expire) {
+        return;
+    }
+
+    if (m_state == ConnectedState) {
+        LOG_DEBUG_ERR("[%s:%u] timeout", m_url.host(), m_url.port());
+        close();
+    }
+
+
+    if (m_state == ConnectingState) {
+        connect();
+    }
+}
+
+
 int64_t Client::submit(const JobResult &result)
 {
     char *req = static_cast<char*>(malloc(345));
@@ -231,6 +251,7 @@ int Client::resolve(const char *host)
 {
     setState(HostLookupState);
 
+    m_expire     = 0;
     m_recvBufPos = 0;
 
     if (m_failures == -1) {
@@ -432,10 +453,11 @@ void Client::reconnect()
 {
     setState(ConnectingState);
 
-    uv_timer_stop(&m_responseTimer);
+#   ifndef XMRIG_PROXY_PROJECT
     if (m_url.isKeepAlive()) {
         uv_timer_stop(&m_keepAliveTimer);
     }
+#   endif
 
     if (m_failures == -1) {
         return m_listener->onClose(this, -1);
@@ -444,7 +466,7 @@ void Client::reconnect()
     m_failures++;
     m_listener->onClose(this, m_failures);
 
-    uv_timer_start(&m_retriesTimer, [](uv_timer_t *handle) { getClient(handle->data)->connect(); }, m_retryPause, 0);
+    m_expire = uv_now(uv_default_loop()) + m_retryPause;
 }
 
 
@@ -462,12 +484,15 @@ void Client::setState(SocketState state)
 
 void Client::startTimeout()
 {
-    uv_timer_stop(&m_responseTimer);
+    m_expire = 0;
+
+#   ifndef XMRIG_PROXY_PROJECT
     if (!m_url.isKeepAlive()) {
         return;
     }
 
     uv_timer_start(&m_keepAliveTimer, [](uv_timer_t *handle) { getClient(handle->data)->ping(); }, kKeepAliveTimeout, 0);
+#   endif
 }
 
 
diff --git a/src/net/Client.h b/src/net/Client.h
index b04c2c3..b7eda32 100644
--- a/src/net/Client.h
+++ b/src/net/Client.h
@@ -62,6 +62,7 @@ public:
     void connect(const Url *url);
     void disconnect();
     void setUrl(const Url *url);
+    void tick(uint64_t now);
 
     inline bool isReady() const              { return m_state == ConnectedState && m_failures == 0; }
     inline const char *host() const          { return m_url.host(); }
@@ -112,14 +113,16 @@ private:
     SocketState m_state;
     static int64_t m_sequence;
     std::map<int64_t, SubmitResult> m_results;
+    uint64_t m_expire;
     Url m_url;
     uv_buf_t m_recvBuf;
     uv_getaddrinfo_t m_resolver;
     uv_stream_t *m_stream;
     uv_tcp_t *m_socket;
+
+#   ifndef XMRIG_PROXY_PROJECT
     uv_timer_t m_keepAliveTimer;
-    uv_timer_t m_responseTimer;
-    uv_timer_t m_retriesTimer;
+#   endif
 };
 
 
diff --git a/src/net/Network.cpp b/src/net/Network.cpp
index 86c5ee7..2e6ec29 100644
--- a/src/net/Network.cpp
+++ b/src/net/Network.cpp
@@ -39,7 +39,6 @@
 
 
 Network::Network(const Options *options) :
-    m_donateActive(false),
     m_options(options),
     m_donate(nullptr),
     m_accepted(0),
@@ -62,6 +61,11 @@ Network::Network(const Options *options) :
     if (m_options->donateLevel() > 0) {
         m_donate = new DonateStrategy(m_agent, this);
     }
+
+    m_timer.data = this;
+    uv_timer_init(uv_default_loop(), &m_timer);
+
+    uv_timer_start(&m_timer, Network::onTick, kTickInterval, kTickInterval);
 }
 
 
@@ -164,3 +168,21 @@ void Network::setJob(Client *client, const Job &job)
 
     Workers::setJob(job);
 }
+
+
+void Network::tick()
+{
+    const uint64_t now = uv_now(uv_default_loop());
+
+    m_strategy->tick(now);
+
+    if (m_donate) {
+        m_donate->tick(now);
+    }
+}
+
+
+void Network::onTick(uv_timer_t *handle)
+{
+    static_cast<Network*>(handle->data)->tick();
+}
diff --git a/src/net/Network.h b/src/net/Network.h
index 21046df..ba1982e 100644
--- a/src/net/Network.h
+++ b/src/net/Network.h
@@ -57,15 +57,20 @@ protected:
   void onResultAccepted(Client *client, int64_t seq, uint32_t diff, uint64_t ms, const char *error) override;
 
 private:
-  void setJob(Client *client, const Job &job);
+  constexpr static int kTickInterval = 1 * 1000;
+
+  void setJob(Client *client, const Job &job);
+  void tick();
+
+  static void onTick(uv_timer_t *handle);
 
-  bool m_donateActive;
   char *m_agent;
   const Options *m_options;
   IStrategy *m_donate;
   IStrategy *m_strategy;
   uint64_t m_accepted;
   uint64_t m_rejected;
+  uv_timer_t m_timer;
 };
 
 
diff --git a/src/net/strategies/DonateStrategy.cpp b/src/net/strategies/DonateStrategy.cpp
index d87e83d..c346801 100644
--- a/src/net/strategies/DonateStrategy.cpp
+++ b/src/net/strategies/DonateStrategy.cpp
@@ -69,6 +69,12 @@ void DonateStrategy::stop()
 }
 
 
+void DonateStrategy::tick(uint64_t now)
+{
+    m_client->tick(now);
+}
+
+
 void DonateStrategy::onClose(Client *client, int failures)
 {
 }
diff --git a/src/net/strategies/DonateStrategy.h b/src/net/strategies/DonateStrategy.h
index 1c7597e..b54b0b1 100644
--- a/src/net/strategies/DonateStrategy.h
+++ b/src/net/strategies/DonateStrategy.h
@@ -49,6 +49,7 @@ public:
     int64_t submit(const JobResult &result) override;
     void connect() override;
     void stop() override;
+    void tick(uint64_t now) override;
 
 protected:
     void onClose(Client *client, int failures) override;
diff --git a/src/net/strategies/FailoverStrategy.cpp b/src/net/strategies/FailoverStrategy.cpp
index 380cf98..37afffe 100644
--- a/src/net/strategies/FailoverStrategy.cpp
+++ b/src/net/strategies/FailoverStrategy.cpp
@@ -74,6 +74,14 @@ void FailoverStrategy::stop()
 }
 
 
+void FailoverStrategy::tick(uint64_t now)
+{
+    for (Client *client : m_pools) {
+        client->tick(now);
+    }
+}
+
+
 void FailoverStrategy::onClose(Client *client, int failures)
 {
     if (failures == -1) {
diff --git a/src/net/strategies/FailoverStrategy.h b/src/net/strategies/FailoverStrategy.h
index f0fa051..616a08d 100644
--- a/src/net/strategies/FailoverStrategy.h
+++ b/src/net/strategies/FailoverStrategy.h
@@ -49,6 +49,7 @@ public:
     void connect() override;
     void resume() override;
     void stop() override;
+    void tick(uint64_t now) override;
 
 protected:
     void onClose(Client *client, int failures) override;
diff --git a/src/net/strategies/SinglePoolStrategy.cpp b/src/net/strategies/SinglePoolStrategy.cpp
index b1a6941..f38405f 100644
--- a/src/net/strategies/SinglePoolStrategy.cpp
+++ b/src/net/strategies/SinglePoolStrategy.cpp
@@ -66,6 +66,12 @@ void SinglePoolStrategy::stop()
 }
 
 
+void SinglePoolStrategy::tick(uint64_t now)
+{
+    m_client->tick(now);
+}
+
+
 void SinglePoolStrategy::onClose(Client *client, int failures)
 {
     if (!isActive()) {
diff --git a/src/net/strategies/SinglePoolStrategy.h b/src/net/strategies/SinglePoolStrategy.h
index 51b1a88..c09d030 100644
--- a/src/net/strategies/SinglePoolStrategy.h
+++ b/src/net/strategies/SinglePoolStrategy.h
@@ -46,6 +46,7 @@ public:
     void connect() override;
     void resume() override;
     void stop() override;
+    void tick(uint64_t now) override;
 
 protected:
     void onClose(Client *client, int failures) override;
diff --git a/src/version.h b/src/version.h
index 3d197ee..81e9539 100644
--- a/src/version.h
+++ b/src/version.h
@@ -27,14 +27,14 @@
 #define APP_ID        "xmrig"
 #define APP_NAME      "XMRig"
 #define APP_DESC      "Monero (XMR) CPU miner"
-#define APP_VERSION   "2.2.1"
+#define APP_VERSION   "2.3.0-dev"
 #define APP_DOMAIN    "xmrig.com"
 #define APP_SITE      "www.xmrig.com"
 #define APP_COPYRIGHT "Copyright (C) 2016-2017 xmrig.com"
 
 #define APP_VER_MAJOR  2
-#define APP_VER_MINOR  2
-#define APP_VER_BUILD  1
+#define APP_VER_MINOR  3
+#define APP_VER_BUILD  0
 #define APP_VER_REV    0
 
 #ifdef _MSC_VER