此应用已不再更新和维护。详情参见：
http://blog.shengbin.me/posts/ipgateway-discontinued
IPGateway（IP网关）
IPGateway is a simple but useful app for logging in/out of the IP gateway of Peking University. Choose the version you need.（IPGateway是一个简单实用的小软件，可以用它方便地登录北京大学的IP网关。从下面选取适合你的版本。）
IPGateway-iOS（在iPhone/iPad上使用）
IPGateway for iPhone and iPad is available in the App Store（iOS版本可以在App Store免费下载）:
https://itunes.apple.com/cn/app/ipgateway/id493761518?mt=8
By the way, you may also use this client（你也可以用下面这个客户端）: IPGWClient.
IPGateway-Mac（在苹果电脑上使用）
IPGateway for Mac is available in the Mac App Store（Mac版可以在Mac App Store免费下载）:
https://itunes.apple.com/cn/app/ipgateway/id1004353231?ls=1&mt=12
You can also click the following link to download the .zip file, extract it, then you will get IPGateway.app to run. Better put it in the /Applications folder).（点击下面的链接去百度网盘下载.zip文件，直接运行解压得到的IPGateway.app即可。最好把它放在/Applications文件夹。）
http://pan.baidu.com/s/1ntG89dv
IPGateway-Android（安卓版）
The app in Google Play can not be updated for some reason, so please download the latest version .apk file directly. （应用商店的版本因故已经不能更新，最新版请从百度网盘下载。）
Click the following link to install it from the Google Play.（点击下面的链接从Google Play应用商店安装。）
https://play.google.com/store/apps/details?id=pku.shengbin.ipgateway
Or click the following link to download the .apk file, and install it on your Android devices. （或者点击下面的链接去百度网盘下载.apk文件，并在安卓设备上安装。）
http://pan.baidu.com/s/1kT3L1R5
Contact（联系开发者）
Have questions or suggestions? Feel free to send me emails（如有任何问题或建议，可发电子邮件至）: shengbinmeng@me.com