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How to Lock Down Your Firewall

This Help Center article is for Postini, a suite of Google services that's now discontinued. If you're searching for instructions related to Google Apps, see the Google Apps Help Center. For instructions related to Google Apps Vault, see the Vault Help Center.

Important: In preparation for the Postini Transition to Google Apps, Postini customers must ensure that their firewall allows both Google and Postini IP address ranges. See How your firewall should be configured for more details.

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