diff --git a/README.md b/README.md
index 4f489dd..ca6d46a 100755
--- a/README.md
+++ b/README.md
@@ -13,8 +13,6 @@ Put `server.py` on your server. Edit `server.py`, change the following values:
 
 Run `python server.py` on your server. To run it in the background, run `setsid python server.py`.
 
-If you want to listen to IPv6 port, run `python server.py -6`.
-
 Put `local.py` on your client machine. Edit `local.py`, change these values:
 
     SERVER        your server ip or hostname
diff --git a/local.py b/local.py
index 84155d5..1e42457 100755
--- a/local.py
+++ b/local.py
@@ -20,7 +20,7 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-SERVER = 'my_server_ip_or_host'
+SERVER = 'my server ip'
 REMOTE_PORT = 8499
 PORT = 1080
 KEY = "foobar!"
@@ -34,35 +34,6 @@ import threading
 import time
 import SocketServer
 
-#disable ThreadingTCPServer dns revsere lookup, sometimes it will be slow
-socket.getfqdn = lambda x:x
-
-def socket_create_connection(address, timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
-                      source_address=None):
-    """python 2.7 socket.create_connection"""
-    host, port = address
-    err = None
-    for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
-        af, socktype, proto, canonname, sa = res
-        sock = None
-        try:
-            sock = socket.socket(af, socktype, proto)
-            if timeout is not socket._GLOBAL_DEFAULT_TIMEOUT:
-                sock.settimeout(timeout)
-            if source_address:
-                sock.bind(source_address)
-            sock.connect(sa)
-            return sock
-
-        except socket.error as _:
-            err = _
-            if sock is not None:
-                sock.close()
-    if err is not None:
-        raise err
-    else:
-        raise socket.error("getaddrinfo returns an empty list")
-
 def get_table(key):
     m = hashlib.md5()
     m.update(key)
@@ -124,7 +95,8 @@ class Socks5Server(SocketServer.StreamRequestHandler):
     def handle(self):
         try:
             sock = self.connection
-            remote = socket_create_connection((SERVER, REMOTE_PORT))
+            remote = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+            remote.connect((SERVER, REMOTE_PORT))
             self.handle_tcp(sock, remote)
         except socket.error as e:
             lock_print('socket error: %s' % str(e))
diff --git a/server.py b/server.py
index 698e61b..8bba3a5 100755
--- a/server.py
+++ b/server.py
@@ -23,12 +23,6 @@
 PORT = 8499
 KEY = "foobar!"
 
-try:
-    import gevent, gevent.monkey
-    gevent.monkey.patch_all(dns=gevent.version_info[0]>=1)
-except ImportError:
-    gevent = None
-
 import socket
 import select
 import SocketServer
@@ -37,35 +31,6 @@ import string
 import hashlib
 import sys
 
-#disable ThreadingTCPServer dns revsere lookup, sometimes it will be slow
-socket.getfqdn = lambda x:x
-
-def socket_create_connection(address, timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
-                      source_address=None):
-    """python 2.7 socket.create_connection"""
-    host, port = address
-    err = None
-    for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
-        af, socktype, proto, canonname, sa = res
-        sock = None
-        try:
-            sock = socket.socket(af, socktype, proto)
-            if timeout is not socket._GLOBAL_DEFAULT_TIMEOUT:
-                sock.settimeout(timeout)
-            if source_address:
-                sock.bind(source_address)
-            sock.connect(sa)
-            return sock
-
-        except socket.error as _:
-            err = _
-            if sock is not None:
-                sock.close()
-    if err is not None:
-        raise err
-    else:
-        raise socket.error("getaddrinfo returns an empty list")
-
 def get_table(key):
     m = hashlib.md5()
     m.update(key)
@@ -126,7 +91,8 @@ class Socks5Server(SocketServer.StreamRequestHandler):
             reply = "\x05\x00\x00\x01"
             try:
                 if mode == 1:
-                    remote = socket_create_connection((addr, port[0]))
+                    remote = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+                    remote.connect((addr, port[0]))
                     local = remote.getsockname()
                     reply += socket.inet_aton(local[0]) + struct.pack(">H",
                         local[1])
@@ -146,8 +112,6 @@ class Socks5Server(SocketServer.StreamRequestHandler):
 
 
 def main():
-    if '-6' in sys.argv[1:]:
-        ThreadingTCPServer.address_family = socket.AF_INET6
     server = ThreadingTCPServer(('', PORT), Socks5Server)
     server.allow_reuse_address = True
     print "starting server at port %d ..." % PORT