Index: pvfs2_src/src/common/misc/server-config.c
===================================================================
--- pvfs2_src/src/common/misc/server-config.c	(revision 2123)
+++ pvfs2_src/src/common/misc/server-config.c	(revision 2124)
@@ -1862,6 +1862,12 @@
     struct server_configuration_s *config_s = 
         (struct server_configuration_s *)cmd->context;
 
+    if (cmd->arg_count == 0)
+    {
+      return NULL; 
+    }
+    else
+    {
     config_s->allowed_masks = (int *) calloc(cmd->arg_count, sizeof(int));
     if (config_s->allowed_masks == NULL)
     {
@@ -1887,6 +1893,7 @@
         config_s->allowed_networks_count = 0;
         return("Parse error in netmask specification\n");
     }
+    }
     /* okay, we enable trusted network as well */
     config_s->network_enabled = 1;
     return NULL;