cluster:Worker/2/node/prepare/firewall
From Dgiref
Allowing incoming connections directed to the WNs is optional and Resource Providers can freely decide whether to permit them on a voluntary base. However, when such inbound connections are blocked, data transfers using GridFTP will be forced to work in "single-stream" mode and their performance might be accordingly degraded (how to open port in firewall).
| Service | Incoming ports (TCP) | Change to default configuration |
| GridFTP | 20000-25000 | Yes |
 WN should have an access to external network |
