port block does not work

Comodo Internet Security - CIS Firewall Help - CIS
#1

I added a global rule to block any access to destination port 1935.
However, after applying this and connecting to a server that runs flash player files through firefox, I then go to view existing connections and it shows a few tcp connections with port 1935.
What else do I need to check?

#2

I added a global rule to block any access to destination port 1935.
However, after applying this and connecting to a server that runs flash player files through firefox, I then go to view existing connections and it shows a few tcp connections with port 1935.
What else do I need to check?