Find Blocked Ports on Network
 

Right now I'm on a college dorm residential network and certain programs (such as IRC and p2p programs) do not work because their ports have been blocked. I *think* there is some sort of proxy server that separates the dorm network from the internet, I am probably wrong. Is there a way to scan the proxy server (assuming that's what it is) and find out what other ports they have blocked?

I called and asked them this very question, but they didn't tell me anything, and I'm just curious to see what other ports they blocked so I know. One thing I do not know is the IP address of the proxy server. How do I find that out?

I've been messing around with nmap a bit, but I really have no idea what I'm doing lol. Appreciate any help.

The "proxy" (which is quite likely to be a router
and/or firewall as well) will probably be what
route
gives you as the default gateway...

But you REALLY should make sure that network
scans aren't a punishable offense on your network,
if I were a sys-admin there and you scanned my
network I'd exclude your machine from ANY traffic
for some time ;)



Cheers,
Tink

To find the proxy server, do
You will get something like
The last local address is the proxy

local addresses start with 10 or 192.
Good Luck

-Joey