According to the HP Forum: https://h30434.www3.hp.com/t5/Printers-Archive-Read-Only/What-ports-to-open-on-ADSL-router-for-ePrint/td-p/457327   You should allow (outbound): 5222 (for XMPP protocol) 443 (for HTTPS protocol)   In order to use ePrint. Thus, I would check the logs in order to see what's going on. Maybe you can trace the network traffic using the MX and/or Wireshark  ... View more

Bummer. Thank you! ... View more

Hi Geri0n, I am a bit confused. Let me tell you what I understood here - You have user machines and POS systems in a restaurant. One requirement is to allow POS systems to only reach out to a cloud server (using a specific Public IP address) and everything else should be blocked. The other requirement is to have user machines access only approved sites. Am I correct? Note: I am talking about inbound to outbound traffic (LAN-WAN) meaning flows are initiated by local devices to outside network and not the other way around. Cheers, Gaurav ... View more