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End-of-Sale for Models 100 and 200

As of October 4th, 2020, all new sales for models 100 and 200 of the Barracuda Email Security Gateway have ceased. Renewals of software subscriptions are still available.

Cloud Protection Layer IP Ranges

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See Active Directory Authentication for a list of IP addresses that must be allowed for uninterrupted access to LDAP from the Barracuda Cloud.

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






United Kingdom


United States

US: and

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 from filtering.
  • Exempt traffic coming from the Barracuda Email Security IP addresses from any kind of throttle or rate controls.
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