Folgende Verbindungen müssen seitens der Firewall erlaubt sein (Basisinstallation).
| Typ | Protokoll | Port | Direction |
|---|---|---|---|
| DNS | UDP | 53 | outbound |
| NTP | UDP | 123 | outbound |
| HTTP | TCP | 80 | outbound |
| HTTPS | TCP | 443 | outbound |
| TFTP | UDP | 69 | outbound |
| Typ | Protokoll | Port | Direction |
|---|---|---|---|
| SIP | TCP/UDP | 5060 | inbound & outbound |
| SIPS | TCP | 5061 | inbound & outbound |
| RTP | UDP | 10000 - 20000 | inbound & outbound (Ports werden vom Client geöffnet) |
| Typ | Sekunden |
|---|---|
| NAT Keep Alive | 300 |
| UDP Session Timer | 300 |