--- a/src/plugins/plugin_misc_ip.py	Tue Nov 24 23:42:49 2015 +0100
+++ b/src/plugins/plugin_misc_ip.py	Wed Nov 25 00:22:23 2015 +0100
@@ -31,6 +31,7 @@
 from zope.interface import implements
 from wokkel import disco, iwokkel
 from twisted.words.protocols.jabber.xmlstream import XMPPHandler
+from twisted.words.protocols.jabber.error import StanzaError
 import urlparse
 try:
     import netifaces
@@ -252,17 +253,20 @@
             defer.returnValue(self._external_ip_cache)
 
         # we first try with XEP-0279
-        if self.host.hasFeature(NS_IP_CHECK, profile=profile):
+        ip_check = yield self.host.hasFeature(NS_IP_CHECK, profile=profile)
+        if ip_check:
             log.debug(u"Server IP Check available, we use it to retrieve our IP")
             client = self.host.getClient(profile)
             iq_elt = client.IQ("get")
             iq_elt.addElement((NS_IP_CHECK, 'address'))
-            result_elt = yield iq_elt.send()
             try:
+                result_elt = yield iq_elt.send()
                 address_elt = result_elt.elements(NS_IP_CHECK, 'address').next()
                 ip_elt = address_elt.elements(NS_IP_CHECK,'ip').next()
             except StopIteration:
                 log.warning(u"Server returned invalid result on XEP-0279 request, we ignore it")
+            except StanzaError as e:
+                log.warning(u"error while requesting ip to server: {}".format(e))
             else:
                 # FIXME: server IP may not be the same as external IP (server can be on local machine or network)
                 #        IP should be checked to see if we have a local one, and rejected in this case