Building private and cheaper ngrok-like tunnels

• In mrvm.net, you can cost USD$4 / year for 1 IPv4 address and 20 ports. In my case, 198.204.227.x 21001 ~ 21020.
• The ssh for mrvm.net is using another port. So you can control your VPS like ssh user@198.204.227.x -p 21021.
• In noip.com, you can register 3 free domain names like abc.hopto.org or xyz.ddns.net.
• Using inlets, you can expose your intranet service on the cloud:
• VPS
• export token=$(head -c 16 /dev/urandom | sha1sum | cut -d" " -f1)
• inlets server --port=21001 --token=$token
• DEV
• python -m SimpleHTTPServer 8000 (or your service)
• inlets client --remote=abc.hopto.org:21001 --upstream=http://localhost:8000 --token=...
• Client
• curl http://abc.hopto.org:21001

Install Appium on CentOS 7

• Refer this guide, install Node.js and npm.
• If you following this guide immediately, Appium install will fail caused by EACCES. So refer this guide for reinstall nvm forcibly.
• Relogin.
• Reinstall npm and Node.js by nvm, command: "nvm install node".
• Now you can install Appium without error.