I would like to have my ports stealthed All the ports are closed ( or stealthed) except for port 135. I’ve tried everything to at least close this port, nothing works. How can I close this port?
Are you behind a router or are you connected directly to the web? When you are behind a router and using a web site like www.grc.com to test your security then you are probing your router and not your Comodo firewall.
To stealth your ports with CIS go to Firewall → Common Tasks → Stealth Ports Wizard → select → Block all incoming connections stealth my ports to everyone → Finish.