Edit
/etc/httpd/conf/httpd.conf
Change
Listen 80

Edit
/etc/httpd/conf.d/elastix.conf
Change and comment 3 lines

# Redirect administration interface to https
RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}

to

# Redirect administration interface to https
# RewriteEngine On
# RewriteCond %{HTTPS} off
# RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}

service httpd restart