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FAQ 58: Use during an emergency

Category: Everything else | Updated: 04/25/2011 4:42 PM

If you provide DNS service across your school or collage campus using DNS Redirector you could easily convey important information in case of emergency. Even if you don't implement RedirectIP= or BlockedIP= functions for every-day use, you could easily enable the RedirectIP= function as part of your emergency action plan.

For example, if there were important security or class cancellation information you wanted to convey, you would enable RedirectIP= to point to that site, or perhaps redirect to your school's homepage. Simply restart DNS Redirector and the change would be active. Any user who launches thier browser or surfs to a site they haven't visited recently would then be redirected to your information page.

You could enable users to continue surfing past this information page by asking them to type a special code, or click a 'I confirm I have read this notice' button, thereby triggering authorization. When the emergency is over, you would remove the RedirectIP= and AuthKeywordsFile= settings, restart DNS Redirector, and continue using it only as a typical DNS forwarding server.

Another method might be to capture all outbound DNS traffic (UDP port 53) at your perimeter firewall/router using rules or ACLs, and redirect it to the DNS Redirector server IP during the emergency.

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