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Barracuda Email Security Service

How Can I Add the Barracuda Email Security Service IP Ranges to O365?

  • Type: Knowledgebase
  • Date changed: one month ago
Solution #00007104

Scope:
Barracuda Email Security Service, using Office 365.

Answer:
  1. Login to the Office 365 website. Click on Admin, then Exchange.
  2. From the Exchange Admin Center (EAC) click on Protection ->Connection Filtering and you will be able to add the IP ranges.
  3. Click on the + sign to add an IP or range in allow or block IP address. If you will type an invalid IP or subnet, then you will get an error.

Note: The required IP ranges for ESS are

64.235.144.0/20
209.222.80.0/21

Some Customers have reported that you can only add /24 ranges to the O365 setup as well as to some on-prem mail servers.
Below is our IP ranges broken down into /24 ranges. Each range will need to be added.

64.235.144.0/24
64.235.145.0/24
64.235.146.0/24
64.235.147.0/24
64.235.148.0/24
64.235.149.0/24
64.235.150.0/24
64.235.151.0/24
64.235.152.0/24
64.235.153.0/24
64.235.154.0/24
64.235.155.0/24
64.235.156.0/24
64.235.157.0/24
64.235.158.0/24
64.235.159.0/24

209.222.80.0/24
209.222.81.0/24
209.222.82.0/24
209.222.83.0/24
209.222.84.0/24
209.222.85.0/24
209.222.86.0/24
209.222.87.0/24

Additional Information:

See the following page for more information on configuring this in O365:

   http://msexchangeguru.com/2014/01/21/eop-block-or-allow-ip/


Link To This Page:

   https://campus.barracuda.com/solution/50160000000uHiSAAU