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Internet stats?

MGallik

MGallik

Golden Member
"In math today I asked my teacher to help me find the equation we would use to find all the possible IPs that are available.
Unfortunately neither of us know if this is correct. And I'm not exactly sure on if 'all possible IP combinations' actually involve
all the combinations for 255.255.255.255. Because the DCHP assigns classes to its IPs and some numbers may be excluded
altogether. This is what we've got so far:

[(3!)(6!)(6!)]^4 + [(2!)(10!)(10!)]^4 + [(1!)(10!)(10!)] = 2.8 x 10^27 (i'm not sure if the answer is correct)"


I was asked this today and dont have an answer. Perhaps a few knowledgeable Anandtechers could help.

Thanks. 🙂
 
theres two masks that aren't available for public IPs though, so you'd have to remove those
 
BTW, 256^4 is: 4,294,967,296

And even private IPs are still IPs, he didn't say Ip's for use on the internet. However, if that's what he meant, he'll have to subtact 192.168. and 10.1. (Those are right, correct?) and of course, 127.0.0.1
 
Originally posted by: notfred
BTW, 256^4 is: 4,294,967,296

And even private IPs are still IPs, he didn't say Ip's for use on the internet. However, if that's what he meant, he'll have to subtact 192.168. and 10.1. (Those are right, correct?) and of course, 127.0.0.1
Click to expand...

and class B 172.160
 
Either way, I have no idea where he came up with that ridiculously long and innaccurate formula.

An IP is a 32 bit value. at the very most it can have 2^32 possible values. Where the hell did 2.8x10^27 come from?
 
And a bit more.......


"I have searched for about 2 hours and have found next to nothing on IPs leased per day. I need to find out how many
IPs are leased per day (including the IPs that are leased currently. As in aren't going to change because they aren't
going offline.)"

Perhaps a link or two if anyone has them. I found a few myself but not as exact as I expected.


Thanks again for the assistance. 😀

 
Originally posted by: notfred
BTW, 256^4 is: 4,294,967,296

And even private IPs are still IPs, he didn't say Ip's for use on the internet. However, if that's what he meant, he'll have to subtact 192.168. and 10.1. (Those are right, correct?) and of course, 127.0.0.1
Click to expand...

What's 127.0.0.1?
 
The internal IP address of your own computer (sorta). I can't explain it perfectly well cause I'm not some Cisco tech or anything, but connecting to 127.0.0.1 means you're connecting to yourself.
 
Originally posted by: Syringer
Originally posted by: notfred
BTW, 256^4 is: 4,294,967,296

And even private IPs are still IPs, he didn't say Ip's for use on the internet. However, if that's what he meant, he'll have to subtact 192.168. and 10.1. (Those are right, correct?) and of course, 127.0.0.1
Click to expand...

What's 127.0.0.1?
Click to expand...

That IP is reserved for local proxies I believe.
 
Does anyone here actually know all of the IPs that are reserved or private/nat use?

I know of
10.x.x.x
172.x.x.x - Some of the B's in this range, but I dont know exactly which...
127.x.x.x - Localhost
192.168.x.x

What other ones are there?
 
Originally posted by: Syringer
Originally posted by: notfred
BTW, 256^4 is: 4,294,967,296

And even private IPs are still IPs, he didn't say Ip's for use on the internet. However, if that's what he meant, he'll have to subtact 192.168. and 10.1. (Those are right, correct?) and of course, 127.0.0.1
Click to expand...

What's 127.0.0.1?
Click to expand...




How are you allowed on the internet without knowing that..........


127.0.0.1 = localhost = loopback address = your connecting to yourself.


That was my official bastard post of the day. Thank you for reading.

 
Originally posted by: Beattie
Does anyone here actually know all of the IPs that are reserved or private/nat use?

I know of
10.x.x.x
172.x.x.x - Some of the B's in this range, but I dont know exactly which...
127.x.x.x - Localhost
192.168.x.x

What other ones are there?
Click to expand...

10.0.0.0 to 10.255.255.255
172.16.0.0 to 172.31.255.255
192.168.0.0 to 192.168.255.255


The only 127.x.x.x that is reserved is 127.0.0.1


*edit* I think theres also one more, in the 169.x.x.x I believe. Not the whole 169 range, but somewhere in there.

 
Originally posted by: silverpig
The internal IP address of your own computer (sorta). I can't explain it perfectly well cause I'm not some Cisco tech or anything, but connecting to 127.0.0.1 means you're connecting to yourself.
Click to expand...

its the interfaces loopback address
 
Originally posted by: Swag1138
Originally posted by: Beattie
Does anyone here actually know all of the IPs that are reserved or private/nat use?

I know of
10.x.x.x
172.x.x.x - Some of the B's in this range, but I dont know exactly which...
127.x.x.x - Localhost
192.168.x.x

What other ones are there?
Click to expand...

10.0.0.0 to 10.255.255.255
172.16.0.0 to 172.31.255.255
192.168.0.0 to 192.168.255.255


The only 127.x.x.x that is reserved is 127.0.0.1


*edit* I think theres also one more, in the 169.x.x.x I believe. Not the whole 169 range, but somewhere in there.
Click to expand...

yeah, I was just thinking about 169.x.x.x

it's where if windows can't obtain an IP and it's on DHCP then it auto assigns a 169.x.x.x address
 
Originally posted by: Hitman32
Originally posted by: Syringer
Originally posted by: notfred
BTW, 256^4 is: 4,294,967,296

And even private IPs are still IPs, he didn't say Ip's for use on the internet. However, if that's what he meant, he'll have to subtact 192.168. and 10.1. (Those are right, correct?) and of course, 127.0.0.1
Click to expand...

What's 127.0.0.1?
Click to expand...

That IP is reserved for local proxies I believe.
Click to expand...

type ping 127.0.0.1 and take notice of the ping time 😉
 
There are alot of ip ranges set aside for specific uses. Here are just the ones I am aware of:

0.0.0.0/8
10.0.0.0/8
224.0.0.0/3
127.0.0.0/8
172.16.0.0/12
20.20.20.0/24
169.254.0.0/16
204.152.64.0/23
192.168.0.0/24

Edit:

We've spent a little bit of time tracking down the current vast tracts of IP address space that have been reserved by the IANA for various reasons, or are otherwise not currently in use at the time this document was written. Since none of these address ranges should be in use currently, there should be no legitimate reason to ever see them as a source address, or to send them traffic as a destination address, right? Right!

So without further ado, the complete list of bogus networks:
#
# s/OUTSIDE/outside-interface (eg: fxp0)
# s/MYNET/network-cidr-address (eg: 1.2.3.0/24)
#
block in on OUTSIDE all
block in quick on OUTSIDE from 0.0.0.0/7 to any
block in quick on OUTSIDE from 2.0.0.0/8 to any
block in quick on OUTSIDE from 5.0.0.0/8 to any
block in quick on OUTSIDE from 10.0.0.0/8 to any
block in quick on OUTSIDE from 23.0.0.0/8 to any
block in quick on OUTSIDE from 27.0.0.0/8 to any
block in quick on OUTSIDE from 31.0.0.0/8 to any
block in quick on OUTSIDE from 70.0.0.0/7 to any
block in quick on OUTSIDE from 72.0.0.0/5 to any
block in quick on OUTSIDE from 83.0.0.0/8 to any
block in quick on OUTSIDE from 84.0.0.0/6 to any
block in quick on OUTSIDE from 88.0.0.0/5 to any
block in quick on OUTSIDE from 96.0.0.0/3 to any
block in quick on OUTSIDE from 127.0.0.0/8 to any
block in quick on OUTSIDE from 128.0.0.0/16 to any
block in quick on OUTSIDE from 128.66.0.0/16 to any
block in quick on OUTSIDE from 169.254.0.0/16 to any
block in quick on OUTSIDE from 172.16.0.0/12 to any
block in quick on OUTSIDE from 191.255.0.0/16 to any
block in quick on OUTSIDE from 192.0.0.0/19 to any
block in quick on OUTSIDE from 192.0.48.0/20 to any
block in quick on OUTSIDE from 192.0.64.0/18 to any
block in quick on OUTSIDE from 192.0.128.0/17 to any
block in quick on OUTSIDE from 192.168.0.0/16 to any
block in quick on OUTSIDE from 197.0.0.0/8 to any
block in quick on OUTSIDE from 201.0.0.0/8 to any
block in quick on OUTSIDE from 204.152.64.0/23 to any
block in quick on OUTSIDE from 219.0.0.0/8 to any
block in quick on OUTSIDE from 220.0.0.0/6 to any
block in quick on OUTSIDE from 224.0.0.0/3 to any
block in quick on OUTSIDE from MYNET to any

If you're going to use these, we suggest that you become familiar with whois.arin.net and keep an occasional eye on these, as the IANA isn't going to notify you when they allocate one of these to a new corporation or something. You have been warned.

reference (scroll way to bottom)
 
Wow, so there IS more to this stuff than hardware! heheh 😉

Great link arynn, Thank You.

I'd like this thread to continue, I'm learning a lot I didn't know I didn't know. 😀
 
I meant Dynamic not Static IPs. By the way, 127.0.0.1 is your local IP--at all time. It can be used to test all your stuff like webservers and portscanners(without upsetting anyone.) 127.0.0.1 is also the default IP of any computer that hasn't been issued or leased an IP. 😎
 
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