For security reasons, you as an administrator may wish to limit the URLs from which users can source content that is displayed on your JIRA or Confluence site (e.g. in an External Gadget). The allowlist (sometimes known as the 'whitelist') is a list of URLs whose content you wish to make available to users of your site.
You can add URLs (or URL patterns) to your alllowlist as described below. Alternatively, if your site and users do not have access to the internet, you can choose to 'Allow all URLs' (see below).
Note that URLs for which Application Links are configured are automatically added to the allowlist, so you do not need to add them to this list.
To configure the allowlist in Jira, see Configuring the allowlist.
To configure the allowlist in Confluence, see Configuring the Allowlist.