diff --git a/shadowsocks/lru_cache.py b/shadowsocks/lru_cache.py
index 32bab66..2a161df 100644
--- a/shadowsocks/lru_cache.py
+++ b/shadowsocks/lru_cache.py
@@ -107,6 +107,25 @@ class LRUCache(collections.MutableMapping):
             logging.debug('%d keys swept' % c)
         return c < SWEEP_MAX_ITEMS
 
+    def clear(self):
+        now = time.time()
+        c = 0
+        while c < SWEEP_MAX_ITEMS:
+            if len(self._keys_to_last_time) == 0:
+                break
+            for key in self._keys_to_last_time:
+                break
+            last_t = self._keys_to_last_time[key]
+            value = self._store[key]
+            if self.close_callback is not None:
+                self.close_callback(value)
+            del self._store[key]
+            del self._keys_to_last_time[key]
+            c += 1
+        if c:
+            logging.debug('%d keys swept' % c)
+        return c < SWEEP_MAX_ITEMS
+
 def test():
     c = LRUCache(timeout=0.3)
 
diff --git a/shadowsocks/tcprelay.py b/shadowsocks/tcprelay.py
index c77faf5..1398e80 100644
--- a/shadowsocks/tcprelay.py
+++ b/shadowsocks/tcprelay.py
@@ -497,7 +497,7 @@ class TCPRelayHandler(object):
         if len(addrs) == 0:
             raise Exception("getaddrinfo failed for %s:%d" % (ip, port))
         af, socktype, proto, canonname, sa = addrs[0]
-        if self._forbidden_iplist:
+        if not self._remote_udp and self._forbidden_iplist:
             if common.to_str(sa[0]) in self._forbidden_iplist:
                 raise Exception('IP %s is in forbidden list, reject' %
                                 common.to_str(sa[0]))
diff --git a/shadowsocks/udprelay.py b/shadowsocks/udprelay.py
index 287d4c8..e4d515a 100644
--- a/shadowsocks/udprelay.py
+++ b/shadowsocks/udprelay.py
@@ -1344,9 +1344,8 @@ class UDPRelay(object):
         logging.debug('UDP close')
         self._closed = True
         if not next_tick:
+            self._cache.clear()
             if self._eventloop:
                 self._eventloop.remove_periodic(self.handle_periodic)
                 self._eventloop.remove(self._server_socket)
             self._server_socket.close()
-            for client in list(self._cache.values()):
-                client.close()