The entire mention of portmap's TCPWRAPPERS in the man page of portmap
says:

     This portmap version is protected by the tcp_wrapper library. You
have 		to
     give the clients access to portmap if they should be allowed to use 	
it.
     To allow connects from clients of the .bar.com domain you could use 	
the
     following line in /etc/hosts.allow:
     portmap: .bar.com
     You have to use the daemon name portmap for the daemon name (even if 	
the
     binary has a different name). For the client names you can only use 	
the
     keyword ALL or IP addresses (NOT host or domain names).
     For further information please have a look at the tcpd((8)),  		
hosts_al-
     low((5)) and hosts_access((5)) manual pages.


Notice how .bar.com is not an IP address?  This example needs to be fixed,
as it misleads people into thinking that names are allowed.  Please at
least change the man page for RHL 7.0