Gibson Research Sheilds Up!

Hi Im new to Comodo and am testing it on my system, Ive used many others, most recently Kerio and like the Comodo interface but I have a few questions.

Comodo fails the GRC Sheilds Up common ports test showing closed not stealthed ports, and shows
the telnet port as open.
This may have something to do with my internet setup…I have a dsl modem connected to a router
to allow all my home cpus to access the net.

What can I do to stealth these ports? Router config or Comodo config, both?


Hi and welcome,

It is not CPF that is the failing the test. As you use a router it is this that is being scanned not the firewall. If you can you can configure the router to stealth the necessary ports, but CPF is protecting you.

With a router you are secure inbound, a software firewall also adds security for outbound (I.E. alerting you to what is accessing the internet, etc).

Again welcome to Comodo and forums,

Thanks for the reply, I really like Comodo, I guess Im just leary because these online security scans
dont show full stealth even when I know the ports are safe.
Running from the router a test shows all ports closed except telnet open, but the connection tab in
Comodo dont show that port as being used.
Running directly from the modem a test shows all ports closed except netbios is stealthed.
I wonder if there is a way to configure the router or Comodo so I get a true stealth reading all
the time? On the other hand I suppose its enough to know Comodo is doing its job!
Thanks again for the reply.

I had the same problem with Shields Up. I did some research with my ISP and found that besides my Router, they have a router on there end that shields up is reporting. So I wound not worry to much.

One thing to do, is check your router and see what it has for an IP address. Then compare that to what Shields UP says is your IP address. I found out that what my router had for an IP address was not the same that Shields UP said was my IP address. What Shields UP said was my IP address was really the router at my ISP.