Cannot mount NAS shares (CIFS, SAMBA) from my new Panoramic residential service

Hi, Lars. I'm glad to assist. We are blocking port 445 at the cable modem level, I must apologize. Here is an HTML page with a list of the blocked ports and reasons: https://www.cox.com/residential/support/internet-ports-blocked-or-restricted-by-cox.html. I'm so sorry for the inconvenience and I hope this helps explain.