problem with ssh running from xinetd

[Bill Tangren]

I an running RH 9 (kernel 2.4.20-43.9.legacysmp), and I run ssh from 
xinetd, using the following script in /etc/xinetd.d/ssh:

service ssh
{
         disable = no
         socket_type = stream
         type = UNLISTED
         port = 22
         protocol = tcp
         wait = no
         user = root
         server = /usr/sbin/sshd
         server_args = -i -u0
         only_from = 4.152.0.0  4.249.0.0  10.1.0.0  24.25.0.0
}

with quite a few more IP addresses added to the only_from line. This has 
worked quite well in the past, but in the last week or so, I have been 
getting break in attempts from IP addresses that should be refused 
outright. The log entries look like this:

Aug  2 12:36:59 doggett sshd(pam_unix)[18868]: authentication failure; 
logname= uid=0 euid=0 tty=NODEVssh ruser= 
rhost=216-177-163-48.block0.gvtc.com
Aug  2 12:37:03 doggett sshd(pam_unix)[18870]: authentication failure; 
logname= uid=0 euid=0 tty=NODEVssh ruser= 
rhost=216-177-163-48.block0.gvtc.com

A reverse lookup on 216-177-163-48.block0.gvtc.com shows that it is 
216.177.163.48, which is not allowed. These problems started when I 
upgraded to the latest fedora legacy kernel.

Has anyone else seen problems like this, and know how to fix this problem?

TIA
Bill Tangren