diff --git a/server_pool.py b/server_pool.py
index 566154c..cdeba36 100644
--- a/server_pool.py
+++ b/server_pool.py
@@ -134,17 +134,17 @@ class ServerPool(object):
 				try:
 					logging.info("starting server at %s:%d" % (a_config['server'], port))
 
-					if not ipv6_ok:
-						tcp_server = tcprelay.TCPRelay(a_config, self.dns_resolver, False)
-						tcp_server.add_to_loop(self.loop)
-						self.tcp_servers_pool.update({port: tcp_server})
+					tcp_server = tcprelay.TCPRelay(a_config, self.dns_resolver, False)
+					tcp_server.add_to_loop(self.loop)
+					self.tcp_servers_pool.update({port: tcp_server})
 
-						udp_server = udprelay.UDPRelay(a_config, self.dns_resolver, False)
-						udp_server.add_to_loop(self.loop)
-						self.udp_servers_pool.update({port: udp_server})
+					udp_server = udprelay.UDPRelay(a_config, self.dns_resolver, False)
+					udp_server.add_to_loop(self.loop)
+					self.udp_servers_pool.update({port: udp_server})
 
 				except Exception, e:
-					logging.warn("IPV4 %s " % (e,))
+					if not ipv6_ok:
+						logging.warn("IPV4 %s " % (e,))
 
 		return True
 
diff --git a/shadowsocks/encrypt_test.py b/shadowsocks/encrypt_test.py
new file mode 100644
index 0000000..68228e1
--- /dev/null
+++ b/shadowsocks/encrypt_test.py
@@ -0,0 +1,33 @@
+from __future__ import absolute_import, division, print_function, \
+    with_statement
+
+import sys
+import os
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), '../'))
+
+
+from crypto import rc4_md5
+from crypto import openssl
+from crypto import sodium
+from crypto import table
+
+def main():
+	print("\n""rc4_md5")
+	rc4_md5.test()
+	print("\n""aes-256-cfb")
+	openssl.test_aes_256_cfb()
+	print("\n""aes-128-cfb")
+	openssl.test_aes_128_cfb()
+	print("\n""rc4")
+	openssl.test_rc4()
+	print("\n""salsa20")
+	sodium.test_salsa20()
+	print("\n""chacha20")
+	sodium.test_chacha20()
+	print("\n""table")
+	table.test_encryption()
+
+if __name__ == '__main__':
+	main()
+
diff --git a/shadowsocks/server.py b/shadowsocks/server.py
index bcccdb5..d919092 100755
--- a/shadowsocks/server.py
+++ b/shadowsocks/server.py
@@ -54,6 +54,7 @@ def main():
     for port, password in config['port_password'].items():
         a_config = config.copy()
         ipv6_ok = False
+        logging.info("server start with password [%s] method [%s]" % (password, a_config['method']))
         if 'server_ipv6' in a_config:
             try:
                 if len(a_config['server_ipv6']) > 2 and a_config['server_ipv6'][0] == "[" and a_config['server_ipv6'][-1] == "]":
@@ -70,16 +71,16 @@ def main():
             except Exception as e:
                 shell.print_exception(e)
 
-        if not ipv6_ok:
-            try:
-                a_config = config.copy()
-                a_config['server_port'] = int(port)
-                a_config['password'] = password
-                logging.info("starting server at %s:%d" %
-                             (a_config['server'], int(port)))
-                tcp_servers.append(tcprelay.TCPRelay(a_config, dns_resolver, False))
-                udp_servers.append(udprelay.UDPRelay(a_config, dns_resolver, False))
-            except Exception as e:
+        try:
+            a_config = config.copy()
+            a_config['server_port'] = int(port)
+            a_config['password'] = password
+            logging.info("starting server at %s:%d" %
+                         (a_config['server'], int(port)))
+            tcp_servers.append(tcprelay.TCPRelay(a_config, dns_resolver, False))
+            udp_servers.append(udprelay.UDPRelay(a_config, dns_resolver, False))
+        except Exception as e:
+            if not ipv6_ok:
                 shell.print_exception(e)
 
     def run_server():