anchor.diff:              iptables -t nat -F POSTROUTING
             '';
         };
  -
     };
  -
   }
  
positive.code: # This module enables Network Address Translation (NAT).
  
  { config, pkgs, ... }:
  
  
negative.code:     };
  
      networking.nat.internalIPs = mkOption {
        example = [ "192.168.1.0/24" ] ;
        description =
          ''
            The IP address ranges for which to perform NAT.  Packets
            coming from these networks and destined for the external
            interface will be rewritten.
          '';
      };
  