Error - Could not open configuration file /etc/httpd/conf.d/nfsen.conf

During the installation of nfsen - a netflow monitoring system on my machine, I stumbled across this error after doing nfsen configuration:

Could not open configuration file /etc/httpd/conf.d/nfsen.conf

I checked all the permissions and they were correct. After some time, I realized that it is an SE-Linux issue!

[root@localhost html]# vim /etc/httpd/conf.d/nfsen.conf
[root@localhost html]# service httpd start
Starting httpd: httpd: Syntax error on line 221 of /etc/httpd/conf/httpd.conf: Could not open configuration file /etc/httpd/conf.d/nfsen.conf: Permission denied
                                                           [FAILED]
[root@localhost html]# ls -l /etc/httpd/conf/httpd.conf
-rw-r--r--. 1 apache apache 34418 Feb 28 21:52 /etc/httpd/conf/httpd.conf
[root@localhost html]# httpd -k start
[root@localhost html]# httpd -k stop
[root@localhost html]# sestatus
SELinux status:                 enabled
SELinuxfs mount:                /selinux
Current mode:                   enforcing
Mode from config file:          enforcing
Policy version:                 24
Policy from config file:        targeted

[root@localhost html]# chcon -t httpd_config_t /etc/httpd/conf.d/nfsen.conf
[root@localhost html]# service httpd start
Starting httpd:                                            [  OK  ]