cvs co problem with Fedora Core 4

When I was trying checkout a module using cvs on Fedora Core 4, using the ext method.

cvs -d:ext:user_name@hostname:/repository co module

It was taking a long time and tried with

Trying krb4 rsh...

And connection was timing out.
This was strange, Fedora was trying with login with RSH instead of SSH. I remember it used work without doing any modifications, later remembered it was RHEL3 and not FC4.
With FC4, you will have to set the CVS_RSH=ssh explicity
In the .bash_profile

CVS_RSH=ssh
export CVS_RSH

Now it should work. Thanks to this post.