how do you find someone's actual ip address if they're behind a dsl/broadband router?

try the site

http://www.showmyip.com/

it will give you the real IP in the head of the page

Don't know. That's a tough one unless you are on the client end of the router itself. But even if you can see the router and get it's IP you would not know the address of a single computer running off that router I suppose if you know what brand router it is and how the DHCP assigns IPs you might be able to guess or trial and error. But then you'd also have to guess how the router configuration is configured to assign IPs.

a million) specific, you will possibly desire to forward port 80 to the computing device's inner IP handle. No, you could not browse directly to it - the computing device is invisible from ouutside the router. 2) you ought to use no-ip or DynDNS to confirm the IP concern. purely sign in for the unfastened provider and run the unfastened utility. then you fairly connect with the named handle you're using.

You don't unless you can hack into the router past the firewall. Tried once for 2 weeks. and finally made it with a constant attack with 2 computers. Unless it is important, it is not worth it and dubious as to legality. Lasted about 3 hours, and the encryption was changed.

log into the router and check its default gateway.