URGENT !! RPC: Unable to receive

[Jon Shoberg <jshoberg cs iusb edu>]

------------------------------------------------
$ passwd
Disk quotas for user jshoberg (uid 1253): none
Changing NIS account information for jshoberg on [server].
Please enter old password:
Changing NIS password for jshoberg on [server].
Please enter new password:
Please retype new password:
RPC: Unable to receive
The NIS password has not been changed on [server].
------------------------------------------------

Any idea ?

NIS is running, all nodes on the network can LOGIN. However, no one can
change the password. All yptools work.  A solution was not found even
after going through the howto :(  All boxes are running RH6.0.  I know
this lacks a little detail of the setup but where is a starting point to
see why this is wrong.

thanks

jon