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

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Figure 124: News server<br />

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

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

Figure 125: News server<br />

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

News server configurations<br />

Chapter 9: Configuring Proxies<br />

Notes on selected proxy configurations<br />

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

the <strong>Sidewinder</strong> <strong>G2</strong> in your network. Two common configurations are listed<br />

below, along with issues to consider with 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 <strong>Sidewinder</strong><br />

<strong>G2</strong>. The external server could be operated by your Internet service provider<br />

(ISP) or by your site. This configuration assumes that news access only via<br />

NNTP is allowed, which is typical (rather than through NFS or a local filesystem).<br />

news client<br />

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

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

In Figure 124:<br />

– An internal-to-external proxy is required to allow internal users access<br />

to the news server. An external-to-internal news proxy is not necessary.<br />

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

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> <strong>G2</strong> on your<br />

internal network.<br />

news client<br />

internal<br />

network<br />

news server<br />

news<br />

proxy<br />

internal<br />

network<br />

external<br />

network<br />

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

external<br />

network<br />

news server<br />

news feed<br />

261

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