Is it possible to block specific ports in hosts.deny or just specific services?

Question

linux

1) I.e. is it possible to do without iptables?
2) And is it possible to bypass these hosts.deny
3) is it possible to give access only to certain ip to certain ports

Answer 1

man tcpd
The short answer is no, the application must be configured or built appropriately to use hosts.{allow,deny}.