Blue Coat SG810 series, Installation Manual

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P/N 231-02941 SG810 Installation Guide page 19
Chapter 2: Configure an SG810
You need to configure an SG810 the first time you power it on to set the basic
network parameters and to make sure that the SG810 hardware and software are
working properly.
The initial configuration might be done either using a standalone PC, a serial
terminal, or after placing the SG810 into your network. The placement of the
SG810 depends on the flow of traffic within your organization. The SG810 must
be able to intercept initial packets on each client or application connection that
needs to be optimized. Typical deployments include:
• Explicit proxy configuration — where the client browser is explicitly
configured to use a proxy server. The browser is given the IP address and port
number of the SG810.
You may also configure the browser to download the proxy settings from a
Web server. This is called a Proxy Auto-Configuration (PAC) file.
• Transparent proxy — where the client browser does not know that the traffic
is being processed by a machine other than the Origin Content Server. To
enable the SG810 to intercept traffic sent to it, you must create a service and
define it as transparent. The service is configured to intercept traffic for a
specified port, or for all IP addresses on that port. Traffic redirection is
managed through polices you create on the redirection device.
A transparent HTTP proxy, for example, typically intercepts all traffic on port
80 (all IP addresses). To make sure that the appropriate traffic is directed to
the SG810, deploy hardware such as a Layer-4 switch or a WCCP router, or
use the SG810 appliance’s software bridge to redirect selected traffic to the
appliance.
The following procedure describes a a typical scenario for placing the SG810 into
your network—placing the SG810 between the LAN and a router or firewall
connected to the WAN. Use this procedure under the following circumstances:
• You have already completed an initial configuration on the SG810 using the
front-panel setup.
• You are going to complete an initial configuration on the SG810 using a direct
serial port connection, Web Setup Wizard, or Director Registration.