Originally Posted by Tuork
Access: (4755/-rwsr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root)
There you go. Like Whig said, the file has setuid flag on (emphasis added). See Wikipedia for more about file permissions
And as for setting up rsh, don't. Don't use rsh unless the environment is totally secure or you absolutely need to save all the CPU time possible. If you need to have password-less login, set up SSH with an RSA/DSA key.