原因：
网站的服务器关闭了，或者设置成内网可以进，就是你的校园网络才可以进，还必须插网线的那种。
六维空间登陆地址： http://bt.neu6.edu.cn/forumdisplay.php?fid=45，若打不开则用如下方法（针对win7 64位计算机）
1. 解决办法： hosts中添加一下语句
2001:da8:9000::232 bt.neu6.edu.cn
2. hosts地址：
用记事本打开C:\WINDOWS\system32\drivers\etc目录下的hosts文件，原文件的内容如下：
# Copyright (c) 1993-1999 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host
在最下面添加一行，先输入IP地址，然后输入网址，中间用几个空格隔开：
比如上面所说的六维空间IP地址和网址，粘贴在上面
2001:da8:9000::232 bt.neu6.edu.cn
【#bt.neu6.edu.cn#】到此分享完毕，希望对大家有所帮助。