How would i got about finding open ports on my college Campus. Ive tried NetStat to give me clues. I want to set up a ftp for my buddies. appreciate some help.

I am not sure what you are asking. Netstat tells you current connections as well as open ports on YOUR machine. If you are looking for open ports on a remote machine I suggest Nmap, which is by far the best port scanner ever (period).

You may be asking how to set up a server. You might be behind a NAT or a proxy server. In that case you are pretty much SOL. I know on home NATs there are default ports that are open and multicasted to all machines running. You might fall under this category. A common port is 6112 tcp, you might want to try that. You could also try random ports above 1024. If you have some skill run a packet sniffer and then do a vanilla scan from a remote location, any incoming SYN's means that you *could* run a server on that port. I know my isp blocks 25(smtp), 80(http) and 21(ftp). Your school might be blocking port 21. Do what I do, try putting your ftp server on something random and easy to remember like port 1234.

I also suggest getting a Dynamic DNS. www.dyndns.org is free.

there is no problem opening ports, it is finding ones that are already open that is the problem. Most sysadmin will close a lot of the ports of so try ones used for telnet 23, ssh 22, or smtp 25 (i think these are right)

use these ports to run a service on that computer as these are usualy unblocked due to reasonst hat should be clear.

buz

YEa....im good with the nat and router..its just hte edu firewall is tightened done...basically all ports are Stealthed. I ran a local test from pcflank.com Did the port Stealth Scanner. ports 1-500 were Stealthed. 80 was Closed. So i know u can set my ftp on port 80..but i still need pasv ports.. :\