NMap Question

[jce108]

Hey I just watched episode 3 and figured I'd check out Nmap and Harrison said he said he knew the subnet. But how do I figure out my subnet?

[stingwray]

If you are on a private network 192.168.x.x then it is most likely to be 255.255.255.0, if you are on a larger private network 10.0.0.0 then it could be 255.0.0.0 but is more likely to be different.

In windows if you go to network connections then and click on the LAN icon you want it should come up with your IP address and subnet. Other than that just run a command window and type:

ipconfig

And that will come up with the answer.

[nbr]

the subnet you check in the last part of the ip... ex. if your ip is 10.0.1.32 then your subnet maybe 10.0.1.1-255

[jce108]

alright kool i got that too work but now this arp thing isn't working it won't pick anything up

[stingwray]

I take it you mean by "ARP thing" Cain and Ables ARP Cache Poisioning Tool, just remember to put the Router/Gateway selected in the first box and in the second box the victims IP.

[mubix]

alright kool i got that too work but now this arp thing isn't working it won't pick anything up

Did you get everything to work or have any more question? If so, feel free to ask here, or check out oxid's tutorials on his page at http://www.oxid.it

[401]

It would probably be helpful if you knew how networks function.

Rather than following harrison's guide step-by-step, try learning 'why' he takes those steps. You'll be less confused, and in the end you'll be proud of yourself for learning a lot.

A few bits to note, to get you started:

-IP address classes

-address translation

-networking protocols

-TCP/IP 3-way handshake