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Barracuda SSL VPN


This Product Is Going End-Of-Life and End-Of-Support

End-OF-Sales: As of 1st March 2019, all new sales for the Barracuda SSL VPN product have ceaved. Only renewals of software and hardware subscriptions are available for a limited time up to an expiration date of 30th November 2020.

End-OF-Life and End-Of-Support on 1st December 2020: All Barracuda SSL VPN sales will cease; neither new sales nor any renewals will be available. If you currently hold a maintenance and support contract, you will continue to receive our award-winning support and services until your contract expires, or until Dec 1st, 2020, whichever occurs first.


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There are two agents for the Barracuda SSL VPN. The Barracuda SSL VPN Agent which secures unencrypted connections from the client computer to the SSL VPN and the Server Agent which creates a SSL tunnel to relay traffic for resources which can not be directly accessed by the SSL VPN. Both Agents create a SSL tunnels to the Barracuda SSL VPN, acting as a transparent proxy. 



The Barracuda SSL VPN Agent is used to tunnel unencrypted connections. The traffic is intercepted and rerouted by the SSL VPN Agent installed on the client computer and then sent through a SSL encrypted tunnel to the Barracuda SSL VPN.

The SSL tunnel creates a secure tunnel into your network. It is important that users log out and do not leave their session unattended. The tunnel will disconnect, if it is inactive for a configurable amount of time.

Server Agent


The Barracuda Server Agent is installed inside of a network, which can not be reached directly by the Barracuda SSL VPN. The Server Agents initiates a HTTPS connection from inside of the network, using port 443. It then waits for requests from the SSL VPN and forwards traffic for the local resources. For example if you want to make the internal company wiki available via SSL VPN, the Server Agent is installed on a computer or server in the same network. It will then act as a transparent proxy, relaying the information to the SSL VPN which delivers the content to the client. The SSL VPN can use multiple Server Agent in different networks, using routes containing host patterns (e.g., *.example.com) to decide which Server Agent to contact for a particular resource. The whole process is completely transparent to the user.

For more information, see How to Configure a Server Agent.

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