LAG, Syn sent?

[scr0p]

My friend is on cable, his connection is laggy and doing netstat shows this: always on no matter what he has open, if anything:
TCP 68.80.155.179:1405 10.10.10.10:80 SYN_SENT

What does that mean and how to fix? I know about syn flood, 3way handshake and stuff, but not in detail

[JoshT]

Well, if 10.10.10.10 has a firewall that "stealths" the ports, that would make sense. The computer sends the first SYN packet to initiate the TCP connection (1/3 of the three-way handshake), never gets a response and has to time out waiting.