Hello everyone,

First I am new to most of this and am stepping into a newer area. I don't claim to be smart or brilliant on any of this. Just willing to learn and become a student of the trade. My question is as follows:

How do I perform an ARP attack on the external network/bypassing the router completely, without disconnecting it and directly plugging into my cable modem?

Example, I want to perform an ARP attack on a cluster of networks after gaining entry to an encrypted router. I imagine I'd have to try default usernames/passwords on the router itself and open it up for all traffic in order to get the information back from the external network?

Thanks in advance,