diff --git a/surveillance/statistiques.py b/surveillance/statistiques.py
index 6fea3feb..8efcd7a9 100644
--- a/surveillance/statistiques.py
+++ b/surveillance/statistiques.py
@@ -22,17 +22,42 @@ import config
 import smtplib
 import socket
 import time, random, md5
+import netaddr
 from analyse import stats
 from affich_tools import tableau
 from iptools import AddrInNet
-from ldap_crans import AssociationCrans
+from ldap_crans import AssociationCrans, crans_ldap
+
+CL = crans_ldap()
 
 # Fonction retournant l'hote quand c'est possible
-def gethostname(s):
-    try:
-        return socket.gethostbyaddr(s)[0]
-    except:
-        return s
+def gethostname(ip):
+    # Poor man's IPv6 reverse DNS...
+    if ":" in ip:
+        # reconstruction de l'EUI48 ŕ partir de l'EUI64...
+        addr_bits = list(netaddr.IPAddress(ip).bits(''))
+        addr_bits[0:64] = []
+        addr_bits[24:40] = []
+        addr_bits[6] = '0'
+        addr_bits = ''.join(addr_bits)
+        mac = ':'.join("%02x" % int(addr_bits[8*i:8*i+8], 2) for i in range(6))
+        res = CL.search("mac=%s" % mac)
+        noms = sorted(r.nom() for r in res["machineFixe"] + res["machineWifi"] + res["machineCrans"] if r.nom().endswith('crans.org'))
+        if noms:
+            return str(noms[0])
+        else:
+            return ip
+    else:
+        try:
+            return socket.gethostbyaddr(ip)[0]
+        except:
+            return ip
+
+def ipv4or6(addr):
+    if ':' in addr:
+        return "IPv6"
+    else:
+        return "IPv4"
 
 # Liste des IP des serveurs
 serveurs_ips = [x.ip() for x in AssociationCrans().machines()
@@ -49,14 +74,6 @@ curseur = pgsql.cursor()
 ###########################
 # Statistiques d'upload : #
 ###########################
-# Y a-t-il eu des récidivistes
-
-def ipv4or6(addr):
-    if ':' in addr:
-        return "IPv6"
-    else:
-        return "IPv4"
-
 # Liste des uploads :
 #####################
 requete = """SELECT ip_crans, sum(upload) AS somme, sum(download)