DNS Redirector
 Return to FAQ List

FAQ 58: Use during an emergency

Category: Everything else

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.

Related articles
FAQ 67  Internet down, so show everyone a message

DNS Redirector | Legal Information | 2003-2019