The portage manual describes a method through which the portage tree can be updated via anonymous CVS. However the CVS server given (cvs.gentoo.org) has been refusing connections for quite a while now (at least several weeks... possibly several months). Suggested resolution is to either: 1) Correct the documentation, if anonymous CVS access is working but through another host; 2) Enable CVS access if the instructions are correct, but the service simply isn't working; 3) Alter the documentation to not mention anonymous CVS access if this method is no longer supported. Personally, 1 or 2 are preferable but I understand that there may be overriding considerations that mean these are not practical.
i fixed this in cvs. //ZhEN