Network Requirements for ZPL Label Designer (Odoo On-Premise with Firewall)
https://ecosystem.ventor.tech/product/odoo-zpl-label-designer-one-time-payment/If your Odoo instance is installed on-premise behind a firewall, you may need to explicitly allow network access for external services used by the VentorTech ZPL Label Designer. Required Network Access To ensure proper operation of the ZPL Label Designer...
