Editing the 'default front page' base URL I rebuilt a new server from another server's image. And I want to use it for a new domain, but I'm finding that the new server continues to redirect to the original server's domain.

Going to the new server's drupal admin console, I see that the domain (ie, https://mysite.com/) is uneditable under Configuration > System > Site Information > Front Page > Default Front Page.

I tried setting the 'base_url' in /etc/drupal/7/sites/default/settings.php to my new domain and flushed the cache, but that didn't resolve the problem (and the old domain still persists in the console).
Have you tried the below changes in your settings.php and .htaccess?

 /sites/default/settings.php

$base_url = 'http://www.example.com'; // NO trailing slash!


and

.htaccess

  # Modify the RewriteBase if you are using Drupal in a subdirectory and
  # RewriteBase /drupal


Try using this.