The IP assigned by your ISP is going to be the WAN address(or external interface) for your router. This means the online test is scanning your router. I have seen ISPs block ports but usually if they block port 80 they also block common trojan ports and tons of others as well. This leads me to the conclusion your router is responding to the scans with these ports blocked. This is not exactly desired behaviour, but is not terribly serious. If I had to guess (and I'm going too ) I would say you need to upgrade the firmware on your router. I have seen linksys firmwares report ports as closed before, and the problem was resolved through a firmware upgrade. As far as the IDENT protocol goes, I would say its not a huge information leak, but it can be used to return the UserID of a particlular TCP connection. This can be used to gather a list of valid accounts for later bruteforce or dictionary attacks on another service, but this scenario is really only troublesome in a multiuser system with services availbale to exploit. (telnet,ssh,etc)

-Maestr0