Ubuntu连上网后只能上百度，其他网都是正在连接，请问是什么原因，该如何解决？

Question

我用的是校园网，重启了n次，死活都谈不出登陆框，刚才试了下挂机再联网，这下登陆框弹出来了，貌似没提示登陆成功，但发现可以上百度，很神奇有木有，其他网上不了，系统是乌班图麒麟，这该怎么解决？

Answer 1

One reason is that your campus network has a firewall and you can only access the Baidu website. The other reason is that the browser caches Baidu's static pages, so you cannot actually access Baidu.

Answer 2

I think the school has set up a WEB proxy server to allow you to open Baidu web pages.
I don't know much about the school's network. I guess the school's authentication server and gateway have been set up. Only after passing the authentication can you access the network outside the school gateway. Otherwise, you can only access various services on the school's internal network.