> For the complete documentation index, see [llms.txt](https://ldsec.gitbook.io/medco-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ldsec.gitbook.io/medco-documentation/v0.2.1/system-administrator-guide/network-architecture.md).

# Network Architecture

![../\_images/network\_architecture.png](https://medco.epfl.ch/documentation/_images/network_architecture.png)

### External Entities

Entities that need to connect to a machine running MedCo can be categorized as follow:

> * **System administrators**: Persons administrating the MedCo node. Likely to remain inside the clinical site internal network.
> * **End-users**: Researchers using MedCo to access the shared. Likely to remain inside the clinical site internal network.
> * **Other MedCo nodes**: MedCo nodes belonging to other clinical sites of the network.

### Firewall Ports Opening

The following ports should be accessible by the listed entities, which makes IP address white-listing possible:

> * Port 22, 5432 (TCP): *System Administrators*
> * Port 80 (TCP): *End-Users* (HTTP automatic redirect to HTTPS (443))
> * Port 443 (TCP): *System Administrators*, *End-Users*, *Other MedCo Nodes*
> * Ports 2000-2001 (TCP): *Other MedCo Nodes*