Ports 900, 902, 903 RRS feed

  • Question

  • Hi,

    Is opening server ports 900, 901, 902, 903 secure for the internet?


    Sunday, October 7, 2018 11:03 PM

All replies

  • Are there any reasons as to why you would want to open these ports? And do you want to open them and expose them only on your network, or to the Internet as well?
    Friday, April 19, 2019 6:21 PM
  • Yes! These ports are required for Microsoft Dynamics AX Retail connectivity from POS Machines.
    Wednesday, April 24, 2019 2:25 AM
  • We're using Dynamics AX here as well, and these ports are most likely open, but not exposed to the Internet. You don't want to expose any sensitive system (such as POS machines) to the Internet, as it would open an attack vector, and they could end up being hacked into (RDP bruteforcing, exploit, etc.) and since they hold sensitive data (maybe CC numbers) it would be a big risk. 

    You should open these ports, but only internally (for use on your LAN and WAN), and not expose them to the Internet.

    Wednesday, April 24, 2019 12:36 PM
  • Yes! we are also securing them with DDNS now.
    Thursday, April 25, 2019 12:13 AM