Sometimes you want Nginx to run on port :80, and you then need to change the port for Apache. You can simply edit it in the “Tweak Settings” page in WHM, replacing 0.0.0.0:80 with 0.0.0.0:81 or, doing it command line way, edit /var/cpanel/cpanel.config and change port 80 in apache_port assignment to 81: Code: apache_port=0.0.0.0:81 Run /usr/local/cpanel/whostmgr/bin/whostmgr2 –updatetweaksettings as advised at the top of that file. Check /usr/local/apache/conf/httpd.conf for any occurences of port 80, and run /scripts/rebuildhttpdconf to make sure httpd.conf is up to date.