The client device connects to the distribution point via port 13000 and, if you are using the distribution point as a push server, also via port 13295; the distribution point multicasts to Network Agents via port 15000 (see figure below). Updates and installation packages are received from a distribution point via port 15001.

Upgrading software on a client device through a distribution point
For schema clarifications, see the table below.
Upgrading software through a distribution point (traffic)
| Device | Port number | Name of the process that opens the port | Protocol | Port purpose | 
|---|---|---|---|---|
| Network Agent | 15000 | klnagent | UDP | Multicasting for Network Agents | 
| Network Agent | 15001 | klnagent | UDP | Receiving updates and installation packages from a distribution point | 
| Distribution point | 13000 | klnagent | TCP (TLS) | Receiving connections from Network Agents | 
| Distribution point | 13295 | klnagent | TCP (TLS) | Receiving connections from client devices (server push) |