I was messing around, scanning my ip with nmap 2day and i have a couple questions about some things that i dont understand:

1. when i scan my ip or my friend's ip(he knew about it) with -sS it doesnt return anything, but if i use -sT, it finds open ports. why is that? we're both comcast users.

2. when i scanned my ip it found port 80, 1080, 119, etc. open. my setup is modem---> router---> mycomp, othercomps. why does it think these ports are open? is it showing that my router has these ports open or is it possible that its scanning the gateway im connect thru at my isp?

3. what exactly happens when u scan a network thats behind a router? does it scan the router or what?

4. when i do an ipconfig, it says this at the top:
Code:
 Connection-specific DNS Suffix  . : ce1.client2.attbi.com
. what is that and what does it mean?


thx for answering my questions