I am attempting to connect to a java based file sharing program. Every time I try to log on it recieves a small packet of information then wont upload and the connection doesnt work. I can connect to websites fine and have no problem with torrents or things like that. According to their support I either have a firewall running or a NAT and have to set allowances for firewall or forward a port to allow server to connect. The problem is my cable modem has no routing abilities or firewall and I have a public ip address and I disabled all software firewalls to try to get it to work and still nothing. I figured I had some sort of TCP/IP problem so I opened up command prompt and ran ipconfig. Theres no problems with my ip, I can ping 220.127.116.11, remote sites and ips without a problem including the server for the file sharing program. I have run anti-spyware and virus and nothing is messing me up. I ran winsock fix xp to see if that would help and nothing. I enabled all adapters on TCP/IP filtering and turned off IPSEC. I have no idea what else could possibly be stopping a connection to server.