Ports restricted for security reasons
| Port | Reason for restriction |
|---|---|
| smtp 25 tcp | Spam prevention (opened on subscriber request) |
| microsoft-ds 445 tcp | Protection against Microsoft Windows vulnerabilities |
| TFTP 69 tcp/udp | Protection of subscriber routers |
| SWAT 901 tcp | Closed to prevent web access to Samba settings |
| Microsoft SSDP/UPnP 1900 udp | The easiest way to gain unauthorized access to a computer! |
| 3332 tcp/udp | Protection against a trojan program |
| 5554 and 9996 | Protection against the "Lovesan", "Lovsan", "Blaster", "Msblast", "Poza" viruses |
