Oh boy, I see someone who is not a lamer. At last! You do actually know a few things about IP addressing (private networks and such).Originally posted by fEš·.·šEr
As you already know, the IPv4 ranges from 0.0.0.0 to 255.255.255.255 which is the hexadecimal representation of FF.FF.FF.FF
It means that you have * 00 00 00 00(hex) possibilities that is equivalent to the decimal number 4 2*4 *67 2*6. (you can double check by using the windows calculator converting Hex to Dec)
When you (correctly) scan one single IP you need to scan all ports from 0 to 655*5 (which is 655*6 total ports!)
Now, let us assume that with your current connection speed and under normal Internet network congestion conditions, you can scan * single IP within * minute (all ports from 0 to 655*5)
You will need 4 2*4 *67 2*6 minutes to scan all IPs (although some Internal IPs are useless to scan (*0.0.x.x / **2.*68.x.x).
Anyways, 4 2*4 *67 2*6 minutes = 7* 582 788 hours =
2 *82 6*6 days = 8 *7* years
As you can see, it is not * month , it is rather 8 *7* years that you need to run a (correct) scan for IPs ranging from 0.0.0.0 to 255.255.255.255.
till then....
[url=http://fever.resourcez.com]fEš·.·šEr[/url]
Still I have further clarifications:
*. No need to scan addresses higher than 224.0.0.0 - for obvious reasons.
2. There are a lot of unused public addresses (networks not used to the limit, you know)
*. Some devices may just happen to be offline when you deside to try them.