diff --git a/shadowsocks/encrypt.py b/shadowsocks/encrypt.py
index ece72ec..a86058b 100644
--- a/shadowsocks/encrypt.py
+++ b/shadowsocks/encrypt.py
@@ -153,7 +153,7 @@ def encrypt_all_m(key, iv, m, method, data):
     return b''.join(result)
 
 
-def dencrypt_all(password, method, data):
+def decrypt_all(password, method, data):
     result = []
     method = method.lower()
     (key_len, iv_len, m) = method_supported[method]
@@ -228,7 +228,7 @@ def test_encrypt_all_m():
         logging.warn(method)
         key, iv, m = gen_key_iv(b'key', method)
         cipher = encrypt_all_m(key, iv, m, method, plain)
-        plain2, key, iv = dencrypt_all(b'key', method, cipher)
+        plain2, key, iv = decrypt_all(b'key', method, cipher)
         assert plain == plain2
 
 
diff --git a/shadowsocks/shell.py b/shadowsocks/shell.py
index f7f4cda..fab8993 100644
--- a/shadowsocks/shell.py
+++ b/shadowsocks/shell.py
@@ -197,6 +197,8 @@ def check_config(config, is_local):
         if os.name != 'posix':
             logging.error('user can be used only on Unix')
             sys.exit(1)
+    if config.get('dns_server', None) is not None:
+        logging.info('Specified DNS server: %s' % config['dns_server'])
 
     encrypt.try_cipher(config['password'], config['method'])
 
@@ -310,10 +312,13 @@ def get_config(is_local):
     config['one_time_auth'] = config.get('one_time_auth', False)
     config['prefer_ipv6'] = config.get('prefer_ipv6', False)
     config['server_port'] = config.get('server_port', 8388)
+
     config['tunnel_remote'] = \
         to_str(config.get('tunnel_remote', '8.8.8.8'))
     config['tunnel_remote_port'] = config.get('tunnel_remote_port', 53)
     config['tunnel_port'] = config.get('tunnel_port', 53)
+    config['dns_server'] = config.get('dns_server', None)
+
 
     logging.getLogger('').handlers = []
     logging.addLevelName(VERBOSE_LEVEL, 'VERBOSE')
diff --git a/shadowsocks/udprelay.py b/shadowsocks/udprelay.py
index e2db886..426150b 100644
--- a/shadowsocks/udprelay.py
+++ b/shadowsocks/udprelay.py
@@ -170,9 +170,9 @@ class UDPRelay(object):
                 else:
                     data = data[3:]
         else:
-            data, key, iv = encrypt.dencrypt_all(self._password,
-                                                 self._method,
-                                                 data)
+            data, key, iv = encrypt.decrypt_all(self._password,
+                                                self._method,
+                                                data)
             # decrypt data
             if not data:
                 logging.debug(