diff --git a/oml/nodes.py b/oml/nodes.py
index 00c28e4..5f05207 100644
--- a/oml/nodes.py
+++ b/oml/nodes.py
@@ -12,6 +12,7 @@ from datetime import datetime
 import os
 import time
 import socket
+import socks
 
 import ox
 from tornado.ioloop import PeriodicCallback
@@ -300,6 +301,9 @@ class Node(Thread):
         except socket.timeout:
             logger.debug('timeout %s', url)
             return False
+        except socks.GeneralProxyError:
+            logger.debug('openurl failed %s', url)
+            return False
         except:
             logger.debug('openurl failed %s', url, exc_info=True)
             return False
@@ -357,6 +361,12 @@ class Node(Thread):
         self._opener.addheaders = list(zip(self.headers.keys(), self.headers.values()))
         try:
             r = self._opener.open(url, timeout=self.TIMEOUT*2)
+        except socket.timeout:
+            logger.debug('timeout %s', url)
+            return False
+        except socks.GeneralProxyError:
+            logger.debug('download failed %s', url)
+            return False
         except:
             logger.debug('download failed %s', url, exc_info=True)
             self.online = False