Internet Content Filtering
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Deployment

There are four connection strategies to choose from when it comes to the placement of the DataCoveCF Web Filtering appliance within your network:

  • Single Interface / Client Configured Proxy mode (Proxy mode)
  • Single Interface / Routed Proxy mode
  • Dual Interface / Transparent Proxy mode (Pass-thru mode)
  • Dual Interface / Client Configured Proxy mode (Pass-thru Proxy mode)

Single Interface / Client Configured Proxy mode (Proxy mode)

Single Interface / Client Configured Proxy mode (Proxy mode)
(Click the image to enlarge)

When in proxy mode, the DataCoveCF Web Filter can be deployed anywhere on the LAN, downstream of the default gateway.

In this mode, all Web traffic (normally, traffic bound for TCP ports 80 and 443) is directed towards the DataCoveCF appliance by the client browsers. Each browser must be configured in some way to send Web traffic to the DataCoveCF appliance, which listens by default on port 8881.

Single Interface / Routed Proxy mode

Single Interface / Routed Proxy mode
(Click the image to enlarge)

In this mode, instead of the client browsers directing Web traffic towards the DataCoveCF appliance, an additional network device such as a router or a switch performs this task. This relieves the administrator of the need to deploy proxy configuration to each client.

Dual Interface / Transparent Proxy mode (Pass-thru mode)

Dual Interface / Transparent Proxy mode (Pass-thru mode)
(Click the image to enlarge)

When the DataCoveCF appliance is deployed in Pass-thru mode, both of the appliance network interfaces are used. One is connected to the side of the LAN where the client machines are located and the other points towards the default gateway.

All traffic bound for the default gateway passes through the DataCoveCF appliance, which intelligently intercepts and filters HTTP traffic whilst allowing other protocols through untouched. Pass-thru is useful when you cannot roll out proxy configuration to all the clients in your network.

However, those features that depend on clients being explicitly aware of the proxy (such as NT authentication and HTTPS filtering) are unavailable.

Dual Interface / Client Configured Proxy mode (Pass-thru Proxy)

In Pass-thru Proxy mode, the appliance is configured as in Pass-thru mode, with one interface pointing towards the LAN and the other towards the default gateway. However, instead of being transparent, client browsers are configured to use the appliance as a proxy. This brings with it the advantages of a traditional proxy deployment, such as HTTPS filtering and NT authentication.

When deployed in Pass-thru mode, it is possible to configure some clients in your network to send Web traffic via the DataCoveCF appliance and to have other clients filtered transparently. You can also make use of different authentication schemes across the different network subnets, giving you maximum flexibility as to how you deploy DataCoveCF.

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