anchor.diff:  
   -define(SUBSYSTEMS, ["echo1", "echo2", "echo3", "echo4"]).
   
  --define(SERVER_ADDRESS, { {127,1,1,1}, {call, ?MODULE, inet_port, [{127,1,1,1}]} }).
  +-define(SERVER_ADDRESS,   { {127,1,0,choose(1,254)},  % IP
  +			    choose(1024,65535)        % Port
  +			  }).
   
   -define(SERVER_EXTRA_OPTIONS,  [{parallel_login,bool()}] ).
   		
  
positive.code:     do_prop_parallel(full_path(?SSH_DIR, CT_Config)).
  
  do_prop_parallel(DataDir) ->
      ?FORALL(Cmds,parallel_commands(?MODULE),
  	    begin
  		{H,Sf,Result} = run_parallel_commands(?MODULE,Cmds,[{data_dir,DataDir}]),
  
negative.code: 		   | ExtraOptions
  		  ])).
  
  ssh_server_post(_S, _Args, {error,eaddrinuse}) -> true;
  ssh_server_post(_S, _Args, Result) -> is_ok(Result).
  
  ssh_server_next(S, {error,eaddrinuse}, _) -> S;
  ssh_server_next(S, Result, [{IP,Port},_,_]) ->
      S#state{servers=[#srvr{ref = Result,
  			   address = IP,
  