Obsolete Services

$ sudo yum install tcp_wrappers

$ sudo yum erase xinetd

$ sudo systemctl mask --now xinetd.service

ALL: ALL

$ sudo chgrp root /etc/hosts.allow

$ sudo chgrp root /etc/hosts.deny

$ sudo chown root /etc/hosts.allow 

$ sudo chown root /etc/hosts.deny 

$ sudo chmod 0644 /etc/hosts.allow

$ sudo chmod 0644 /etc/hosts.deny

$ sudo yum erase ypserv

$ sudo systemctl mask --now ypbind.service

$ sudo systemctl mask --now ypserv.service

$ sudo yum erase rsh-server

$ sudo systemctl mask --now rexec.socket

$ sudo systemctl mask --now rlogin.socket

$ sudo systemctl mask --now rsh.socket

$ sudo rm /[path]/[to]/[file]/shosts.equiv

$ sudo rm /etc/hosts.equiv

$ rm ~/.rhosts

$ sudo find / -name '.shosts' -type f -delete

 $ sudo yum erase talk-server

$ sudo yum erase talk

$ sudo yum erase telnet-server

$ sudo systemctl mask --now telnet.socket

 $ sudo yum erase tftp-server

$ sudo systemctl mask --now tftp.service

server_args = -s