And the SSH port is not open either, so my brother set up a data redirection connection for me that I can pass his machine to Fancy. And the FTP can be connected via the SSH tunnel.
$ ssh -l username ssh_server -p 8080 -L 5999:cvsup.tw.freebsd.org:5999
I also change the cvsup server setting in /etc/make.conf to localhost.
And then after opening a new login session, I can make update again. :)