- Collector #1507: Zope now binds again to all available IP addresses if
        ip-address is unset

doc/CHANGES.txt

@@ -58,6 +58,9 @@ Zope Changes
 
     Bugs fixed
  
+      - Collector #1507: Zope now binds again to all available IP addresses if
+        ip-address is unset
+
       - Use 'del' instead of 'list.remove()' in
         Catalog.delColumn(). There can be only one column with the
         same name, and it could potentially break catalog metadata as

lib/python/ZServer/datatypes.py

@@ -41,7 +41,6 @@ def get_default_host_info():
         if os.name == 'posix' and 'localhost' in hostname.lower(): 
             hostname = ''
         _default_host_info = hostname, ip
-
     return _default_host_info
 
 
@@ -59,6 +58,9 @@ class ServerFactory:
         if defaulthost:
             hostname = defaulthost
             ip = socket.gethostbyname(hostname)
+        elif defaulthost is '':
+            hostname = ''
+            ip = '127.0.0.1'
         else:
             hostname, ip = get_default_host_info()
         if not self.host: