Troubleshooting External Authentication Issues for RADIUS on an SELinux Machine

On an SELinux-enabled machine, do not copy any modified pld.conf file from a different location and replace it with the existing file, as SELinux blocks access to such files. Instead, edit the pld.conf file contents directly using the vi/vim editor.

On an SELinux enabled machine, for External Authentication with the RADIUS Server, after copying the mod_auth_xradius.so file to the directory /usr/lib64/httpd/modules/, execute the this command to prevent SELinux from blocking access:

chcon -t httpd_modules_t /usr/lib64/httpd/modules/mod_auth_xradius.so

On a SELinux enabled machine, for External Authentication with Radius, perform the following tasks if you encounter this error after restarting HTTPD:

Permission
                denied: xradius: Cannot create DBM Cache at `/var/authxcache

chcon -R -t httpd_cache_t /var/authxcache.dir
chcon -R -t httpd_cache_t /var/authxcache.pag
systemctl restart httpd.service