Desktop Applications Versus Web-Based Applications
The Barracuda Web Security Gateway offers administrators control over both desktop and web based applications. Common desktop applications include iTunes, Real Player and Jabber, which use both standards based and proprietary communication protocols. Web based applications include Facebook and LinkedIn and are primarily presented through a web browser. This article defines how the administrator can create block/allow policies and archive social media interactions with the Barracuda Web Security Gateway.
Managing Desktop (Non Web-Based) Applications
In the case of desktop applications, the Barracuda Web Security Gateway enables administrators to define block/allow policies on popular applications using the BLOCK/ACCEPT > Applications page. For instance, file sharing sites such as BitTorrent and communication apps such as AOL IM can be blocked as per corporate policy. These policies can be defined against authenticated and unauthenticated users to offer more access to a given set of users.
Further, entire protocols can be blocked such as FTP, POP, and SSH. See How to Block FTP and other Standard Protocols.
Managing Web-Based Applications
The Web Application Control feature offers administrators fine grained control over web applications. What this means is that, when the SSL Inspection feature is enabled on the Barracuda Web Security Gateway 410 and higher, administrators can create policies such as:
- Block certain portions of web based applications such as Facebook Chat and Facebook Sharing, while allowing users access to the rest of Facebook.
- Block access to Google Consumer Apps such as Google personal email accounts, but allow access to Google business (or education) email accounts. This feature requires Barracuda Web Security Gateway version 9.1 or higher. Because of the way Google now handles SSL certificates, there are currently some restrictions with SSL Inspection on Google sub domains. For details, see Google Restrictions With SSL Inspection. For examples of block/allow policies with Google business/education versus consumer accounts, see G Suite Control Over HTTPS and How to Restrict YouTube Content On Your Network. For Chromebooks users, if you are running the Barracuda Web Security Gateway 10.1 or above, see How to Get and Configure the Barracuda Chromebook Security Extension.
With the Facebook example, the administrator can define what they deem permissible on their network without having to block all of Facebook. As shown in Figure 1 below, the Facebook Twitter app and Games have been added to the list on the right of Blocked Applications. See the BLOCK/ACCEPT > Web App Control page for more information and to configure.
Figure 1. Facebook is generally allowed, but the Facebook Twitter app and Games have been blocked by the administrator.
Monitoring Social Media Content
The Barracuda Web Security Gateway receives periodic updates to its application and web application definitions to quickly react to the dynamics of the market. See Using SSL Inspection With the Barracuda Web Security Gateway and How to Configure SSL Inspection for details.