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Sidewinder G2 6.1.1 Administration Guide - Glossary of Technical ...

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Notes on selected proxy configurations<br />

Figure 8-4. News server<br />

in front <strong>of</strong> the <strong>Sidewinder</strong><br />

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

8-20 Configuring Proxies<br />

Whether you need Usenet News proxies in one direction or two will<br />

depend on your server configuration, as described below. Normally<br />

you will use the NNTP proxy so that news can be transferred only to<br />

and from your feed site.<br />

News server configurations<br />

You have several options for configuring a Usenet News server when<br />

you use the <strong>Sidewinder</strong> <strong>G2</strong> in your network. Two common<br />

configurations are listed below, along with issues to consider with<br />

each.<br />

News server in front <strong>of</strong> the <strong>Sidewinder</strong> <strong>G2</strong><br />

In this configuration, your news server is placed in front <strong>of</strong> the<br />

<strong>Sidewinder</strong> <strong>G2</strong>. The external server could be operated by your<br />

Internet service provider (ISP) or by your site. This configuration<br />

assumes that news access only via NNTP is allowed, which is typical<br />

(rather than through NFS or a local filesystem).<br />

news client<br />

internal<br />

network<br />

news<br />

proxy<br />

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

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

external<br />

network<br />

news server<br />

In Figure 8-4:<br />

— An internal-to-external proxy is required to allow internal<br />

users access to the news server. An external-to-internal news<br />

proxy is not necessary.<br />

— Your router should be used to limit access so that only your<br />

news feed site can access the news server from the Internet.<br />

News server behind the <strong>Sidewinder</strong> <strong>G2</strong><br />

In this configuration, your news server is behind the <strong>Sidewinder</strong><br />

<strong>G2</strong> on your internal network.

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