| Update status | May 2023 |
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| Product relevance | ProCall 8 Enterprise ProCall 7 Enterprise |
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In order for estos ProCall mobile apps to be supplied with messages from the estos ProCall Enterprise server even in background operation on smartphones, the estos UCConnect push service must be used.
It must always be possible for the estos ProCall Enterprise server to reach this UCConnect cloud service.
Diagram/topology: UCServer service - UCConnect Push Service - Mobile App
| Rule # | Task | Direction | Source IP: Port | Destination IP: Port | Protocol | Comments |
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| 1 | Push notifications | OUT | UCServer:any | ucpush.ucconnect.de:443 | TLS/TCP |
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Best practice: Setting up the UCServer for ProCall mobile apps
Hostnames and IP addresses of online services for firewall configuration
