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Oxygen XML Developer comes with a built-in firewall that controls the access to external resources. Anytime the application detects a request to connect to a remote resource, it checks to see if the URL belongs to a domain that has been identified as trusted. If not, a confirmation dialog box will be displayed where you can choose whether to allow or reject access to the remote connection.

Figure 1. Trusted Hosts Confirmation Dialog Box
You can configure the list of trusted hosts using the Trusted Hosts preferences page. It contains a list of domains that have been identified as trusted. You can add or remove domains from the list and Oxygen XML Developer will allow connections to the listed hosts without requesting user confirmation.
Note: Connections defined in the Data Sources preferences page or accepted by add-ons are also considered trusted.
To add or remove domains, open the Preferences dialog box (Options > Preferences) and go to Network Connection Settings > Trusted Hosts. The following options are available:
  • New - Allows you to manually add a new entry to the list of trusted hosts.
    Tip: You can specify a specific port at the end of the URL (for instance, www.example.com:8080). Otherwise, if no port is specified, connections will be allowed on all ports for the particular host.
  • Delete - Allows you to remove an entry from the list of trusted hosts.