Metro Loop Blocked Ports

The following ports are blocked for outbound traffic with all dynamic IP addresses.

• 25 - SMTP
• 137 - NetBIOS Name Service
• 138 - NetBIOS Datagram Service

• 139 - NetBIOS Session Service
• 445 - Microsoft Directory Service (Windows file sharing, SMB/Samba)

For more information on ports and associated services please see the following Wikipedia entry.

https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers