Barracuda Cloud Protection Layer IP address ranges based on the region selected during setup:
Customers Using the Following Instances of the Barracuda Email Security Service Instance
US: 184.108.40.206/20 and 220.127.116.11/21
Ensure Connectivity and Redundancy
Follow these tips to ensure connectivity and redundancy:
- Open your firewall ports to allow the IP address ranges, based on your Barracuda Email Security Service instance
- (Optional) Configure your mail server or router to block inbound email not originating from your Barracuda Email Security Service IP address ranges.
- If you have a Barracuda Web Security Gateway or Barracuda Web Application Firewall: You might need to exempt ess.barracduanetworks.com from filtering.
- Exempt traffic coming from the Barracuda Email Security IP addresses from any kind of throttle or rate controls.