Is your modem connecting to a wireless router, or perhaps has a built in router? The ShieldUp! test will probe whatever is between you and the internet. If you are connecting through a router, the router will be probed instead of your software firewall.
In my opinion, it’s really not a problem. The ports are closed. It doesn’t matter if they’re stealthed. And if someone does get past whatever gateway/router you’re behind, they’ll then encounter your software firewall.
But if it’s really important to you that these two ports show stealth, you’ll need to either refer to your modems documentation, or contact the manufacturers technical support to find out if this is possible. It may not be.
The software is secure. Unfortunately the way GRC’s test works, unless you have a direct connection to the internet, it’s not going to be testing your PC’s defenses. However, like I said, that does mean you have another layer of protection between you and the internet.
Here’s my recent experience with this issue that may lead somewhere.
I run 2 rigs XPsp3 & Win7sp1 through Internet Connection Sharing(ICS) on the XP rig that is running CIS 5.3.181415.1237. Internet via Cable modem.
I’m used to seeing a clean report from GRC Shields Up!, but noticed that since I connected my second rig through ICS I get back a ‘Fail’ from Sheilds Up! because port 0 & port 1 status is ‘closed’, but not ‘stealthed’.
When I first ran the Shields Up! scan from XP, my Win7 rig was powered off. When I turned the Win7 rig on and ran Sheilds Up! from it - I got a clean scan, all passed inc. ports 0 & 1. Meanwhile… back to the XP rig and I got a clean scan there too! Completely stealthed on both platforms.
Tryed to emulate original conditions by turning off the Win7 rig, and ran scan on XP but no change - still all stealthed. Then I switched OFF ICS in ‘Local Area Connection Properties’ (see attached pic) and bingo. Sheilds Up! reports ports 0 & 1 as closed, but not stealthed.
I’ll come back if I can get a better handle on what’s going on. Ideas from all very welcome.
port 0 shows closed here but not stealth, has been like that forever.
I think in older versions of comodo it didnt, i have all my ports open on the router, and they show open if i deactivate comodo, but when i activate comod, they all go stealth, except 0 which remains closed. I think its not with router itself :X.
Mainlly because i have in router every traffic redirected to my gaming/p2p PC, so comodo its the only security layer there.
Anyways port 0 doesnt seem to exist anywhere, isnt it a special port or sumthing like that? i cant put router rules for it
Anyways this should be looked for, other firewalls dont show that “problem”.