This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I wouldn't post IP addresses of your own machines, email addresses or login details on any publicly available website. It can attract the wrong attention, like that of a spammer / hacker. In this case it doesn't even tell us a single thing because 172.x.x.x addresses are for internal networks only, and cannot be accessed over the Internet directly.
Am I right in guessing that the 172.x.x.x address is the internal IP address of the machine, and you want to connect to it from somewhere outside the same network (so through the Internet)? If so that won't work without a proper port forwarding rule in the firewall / router that sits in front of the machine. You should then use the public address to connect to it. The firewall / router will accept these connections and forward them to the 172.x.x.x machine. Check your firewall / router manual for how to do this.