configure ssh-access

[klaus@came.sbg.ac.at]

Hi!

I want to make ssh-access possible only from a restricted
number of hosts - those that are named in /etc/hosts.allow.
Users who want to login have a DynDNS host-name that shall
be listed in hosts.allow to make it possible for users with
a dial-up internet connection, too.

BUT:
The problem is that I can only login to the ssh-machine
when I enter the IP-address to the hosts.allow file.
Specifying the hosts DNS-name does not work!

AND:
I'd prefer to specify the rules for loggin into the machine
in the sshd_config-file, not in hosts.allow/deny.
But the AllowHosts/DenyHosts-options that could be used in 
/etc/sshd_config earlier seem to be not any
longer available at the SSH-version I'm using. 
It's: openssh-3.4p1-80 on a SuSE 8.1

Has anybody ideas in this 2 problems?

thx in advance,
Klaus



-- 
Klaus Siegesleitner - klaus@came.sbg.ac.at 
SysAdmin at CAME (Center of Applied Molecular Engineering) 
University of Salzburg, Jakob-Haringerstrasse 5, A-5020 Salzburg