10-22-2013 12:36 PM
Re: Open port 139 and 445
"For the protection of the network and our customers, Comcast Business Internet blocks certain ports. The ports are blocked to protect against common viruses and worms, malicious intruders, and other security risks. These ports are blocked to protect our customers and the integrity of the Comcast Network; these blocks cannot be lifted."
For additional information and a complete list of Blocked ports click here