# Altipeak communication flow That a Safewalk Server and a Gateway can communicate together, they need the following communication channels. ### Safewalk Server FW Settings [![image-1621343820920.png](https://doc.gecloud.ch/uploads/images/gallery/2021-05/scaled-1680-/image-1621343820920.png)](https://doc.gecloud.ch/uploads/images/gallery/2021-05/image-1621343820920.png) ### Safewalk GW FW Settings [![image-1621343844320.png](https://doc.gecloud.ch/uploads/images/gallery/2021-05/scaled-1680-/image-1621343844320.png)](https://doc.gecloud.ch/uploads/images/gallery/2021-05/image-1621343844320.png) ### When a Web Application Firewall (WAF) is installed in front of the Safewalk GW [![image-1621343880050.png](https://doc.gecloud.ch/uploads/images/gallery/2021-05/scaled-1680-/image-1621343880050.png)](https://doc.gecloud.ch/uploads/images/gallery/2021-05/image-1621343880050.png)