Morning Sneh,
There isn't anyway you can perform blocking of hosts by using host.allow/deny since they are only to be used with applications compiled with/configured with support for tcp_wrappers. Read the xinetd/inetd docs for more info.
As amish suggests your options are to look at iptables or look up the oracle ACL. I am very sure oracle provides a way of doing so. Google dear...!!!
Trevor
===== |------|____________________________________|------| ( >- / Scaling FreeSoftware & OpenSource \ -< ) /~\ / In the Enterprise \ /~\ | ) \ | www.fsf.org | www.opensource.org | / (/ | |_|_ ____________________________________/ _|_|
__________________________________ Do you Yahoo!? Take Yahoo! Mail with you! Get it on your mobile phone. http://mobile.yahoo.com/maildemo