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

[John Matthews]

On 23/04/10 12:31, Rob Beard wrote:
> 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
>
>
>    

Hi Rob,

Now that is interesting. I did all the checks, and came back telling me 
I am 100% in stealth, but I still failed because they could ping me. 
Plus, it was a bit strange because on one of the things it said 'it was 
unusual to find a windows machine so completely hidden'. But I'm not 
using windows, I'm using Ubuntu.

That is amazing really considering.

John