I’m a new Comodo user. When I got warnings that Firefox and Thunderbird wanted to be servers, I approved that. Now they each have TCP/UDP In permissions and Out permissions and are working fine.
I wonder, though, are there any security risks, and should these permissions be narrowed somehow? What kind of communications originating outside are these programs looking for?
Hi Ravenheart, welcome to the forum 
What your seeing is a standard feature of CFP and is quite safe. There is a good explanation here:
Explanation of “Connect as Server”
Toggie
Toggie, thanks.
So is the idea that the Application Monitor and Network Monitor rules are kind of in series, a gauntlet that packets must get through? The standard Network Monitor Rule 0 passes all TCP/UDP out, but there’s no corresponding In rule, so Stealth happens? Do I have that right?
That’s pretty much it
NM allows the flow of information to and from, with the appropriate rules, but only for applications for which there are corresponding AM rules.