Issue
During installation EVnearSync Core will create firewall rules on the local host to allow communication between EVnearSync agents, and the Core. These ports may also need to be opened on a proxy or firewall between the machines in the network environment, this article describes those ports.
Solution
The following ports are used for communication within EVnearSync:
| Source | Destination | Port(s) | Description |
| Agents | Core | 4343 (HTTP) | Communication between the agent and the core. |
| Core | Administrator/Operator | 80 | Communication between the Operator/Administrator and the web interface/Core. |
| Agents | Remote storage | TCP 445 (CIFS) | To be able to read and write data being replicated. |
| Agents | SQL Server | TCP 1433 | Communication from Agent to both EV SQL and EVnearSync SQL Databases. |
| Core | SQL Server | TCP 1433 | Communication from Core to both EV SQL and EVnearSync SQL Databases. |
