diff --git a/shadowsocks/tcprelay.py b/shadowsocks/tcprelay.py
index a4e5c7b..a6c981a 100644
--- a/shadowsocks/tcprelay.py
+++ b/shadowsocks/tcprelay.py
@@ -564,22 +564,6 @@ class TCPRelayHandler(object):
             remote_sock_v6.setblocking(False)
         else:
             remote_sock.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 1)
-            remote_sock.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
-            if self._is_local:
-                val_idle = 60
-                val_intvl = 5
-            else:
-                val_idle = 120
-                val_intvl = 20
-            if platform.system() in ['Linux']:
-                remote_sock.setsockopt(socket.SOL_TCP, socket.TCP_KEEPIDLE, val_idle)
-                remote_sock.setsockopt(socket.SOL_TCP, socket.TCP_KEEPINTVL, val_intvl)
-                remote_sock.setsockopt(socket.SOL_TCP, socket.TCP_KEEPCNT, 5)
-            elif platform.system() in ['Windows']:
-                remote_sock.ioctl(socket.SIO_KEEPALIVE_VALS, (1, 1000 * val_idle, 1000 * val_intvl))
-            elif platform.system() in ["Darwin"]: #OSX
-                TCP_KEEPALIVE = 0x10
-                remote_sock.setsockopt(socket.SOL_TCP, TCP_KEEPALIVE, val_intvl * 2)
 
             if not self._is_local:
                 bind_addr = ''