What ports are blocked on Cable ONE's high-speed internet service?
Cable ONE reserves the right to employ network management practices (e.g., to prevent the distribution of viruses or other malicious code) as well as to block the transfer of unlawful content. As such, Cable ONE blocks ports 135, 136, 137, 138, 139 & 445. In addition, SMTP Port 25 and SSDP Port 1900 are restricted for residential customers.
Note: For additional information on Cable ONE's Network Management Information, please click here.