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Sidewinder G2 6.1.2 Administration Guide - Glossary of Technical ...

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Chapter 13: Setting Up Web Services<br />

Using the HTTP proxy<br />

Using the HTTP<br />

proxy<br />

378<br />

Figure 163: Standard<br />

(transparent) HTTP proxy<br />

Figure 164: Nontransparent<br />

HTTP proxy<br />

Using the appropriate Web Application Defenses, you can configure additional<br />

HTTP proxy rules that control URL properties, perform request and reply<br />

header filtering, perform MIME/anti-virus filtering, and deny certain types <strong>of</strong><br />

Web content. You can also configure whether connections will be transparent<br />

or non-transparent. If you configure transparent HTTP, it will appear to a user<br />

that they are connecting directly to the Web server rather than connecting to<br />

the <strong>Sidewinder</strong> <strong>G2</strong> first. See “Creating Web or Secure Web Application<br />

Defenses” on page 156.<br />

If using the HTTP proxy, caching is not available<br />

If you configured your <strong>Sidewinder</strong> <strong>G2</strong> to use the default Internet Services rule,<br />

your active proxy rule group includes the HTTP service. This rule allows Web<br />

access from your internal network to external networks using the HTTP proxy.<br />

Users on your internal network can connect to the Web using any Web<br />

browser; the connections will be routed through the <strong>Sidewinder</strong> <strong>G2</strong> on port 80.<br />

Figure 163 depicts access to external Web servers via an HTTP proxy rule<br />

using port 80 allowing transparent connections. Figure 164 depicts access to<br />

Web servers via non-transparent HTTP proxy rule using ports other than 80.<br />

(Transparency is configured on a per-rule basis via Application Defenses.)<br />

Note: For information on configuring the HTTP proxy, see “HTTP/HTTPS<br />

considerations” on page 259.<br />

Web<br />

browser<br />

port 80<br />

port 8080<br />

internal<br />

network<br />

internal<br />

network<br />

http<br />

proxy<br />

<strong>Sidewinder</strong> <strong>G2</strong><br />

Web<br />

browser port 8080<br />

nt_http<br />

or any other<br />

port<br />

proxy<br />

<strong>Sidewinder</strong> <strong>G2</strong><br />

external<br />

network<br />

port 80<br />

external<br />

network<br />

port 80<br />

or any other<br />

port<br />

Internet<br />

Internet<br />

Web site<br />

Web server<br />

Web site<br />

Web server

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