In both cases, specific hostnames must use FIRST name as listed in hosts or 
by reverse DNS lookup.


/etc/hosts.equiv and $HOME/.rhost are of form
    hostname username1 username2
Can use + to mean all.
Can not use IP addresses, nor wildcards like .domain.name or *.domain.name 
for hostnames.
Each hostname must be + or a specific host name.

/etc/hosts.allow /etc/hosts.deny
    inetd-svc-name: hostname1 hostname2...
(forget suppying user names here, because requires non-secure remote user
name lookups).
Can use ALL to for service name or hostname.
Can use lots of other wildcards for names and addresses.  See man page.
    sshd: x
    sshd: y
is equivalent to
    sshd: x y