之前好像没有这样，我用浏览器却可以打开相应的站点，没有用代理服务器。。。

http://cn.archive.ubuntu.com/ubuntu/dis ... ackages.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... ackages.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... Sources.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... Sources.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... ackages.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... Sources.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... ackages.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... Sources.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... ackages.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... ackages.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... Sources.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://cn.archive.ubuntu.com/ubuntu/dis ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... ackages.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://debian.ustc.edu.cn/ubuntu/dists/ ... Sources.gz: 407 Unauthorized
http://ubuntu.cn99.com/ubuntu/dists/fei ... Sources.gz: 407 Unauthorized