diff --git a/gestion/iptools.py b/gestion/iptools.py
index 5acba0c5..9122dd42 100755
--- a/gestion/iptools.py
+++ b/gestion/iptools.py
@@ -7,6 +7,8 @@ Copyright (C) Fr
 Licence : GPLv2
 """
 
+import re
+from config import NETs_regexp
 
 # Pour accélérer QuadToDec...
 __QuadToDecDone = {}
@@ -118,6 +120,13 @@ def AddrInNets(ip,nets) :
             return True
     return False
 
+def is_crans(ip):
+    if re.match(NETs_regexp['all'], ip):
+        return True
+    return False
+
 if __name__ == '__main__' :
     import sys
     print param(sys.argv[1])
+
+