[ubuntu-uk] Checking to make sure you are safe...port checking etc.

[Rob Beard]

On 23/04/10 11:47, John Matthews wrote:
> Even though we get told most of the time Linux is safe, the more tis
> used, the more viruses will get written for it. I noticed somebody was
> talking about checking ports to see if they are visible to the outside.
> How do you do that? Is there any software, or can it be done via the
> Terminal. Can somebody help?
>
> John.
>

There is Shield's Up from the Gibson Research Corporation...

https://www.grc.com/x/ne.dll?bh0bkyd2

What it does is check against your internet side IP address (the IP 
address that your ISP will give you) and it will scan for open ports 
(basically whatever your router might be forwarding to your internal PC 
IP addresss).

Rob