Check if cmlab's server IP banned by NTU
Clone it, and set up config.
$ git clone https://github.com/SSARCandy/cml-ip-checker.git
$ cd cml-ip-checker/
$ npm install
$ cp config/default.js config/config.js
$ vim config/config.js # fill-up data
Add into cronjob
$ crontab -e
# add this line
# 0 0 * * * node <path>/index.js