If you see such errors in auth.log:
Sep 2 09:51:16 sshd[22492]: warning: /etc/hosts.allow, line 9: missing newline or line too long
Sep 2 09:51:16 sshd[22492]: warning: /etc/hosts.allow, line 9: all the subsequent rules will be ignored
Just insert a new blank line under line 9. :)