Replication of site A
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Our goal is to get ISO27001 certification for Site A including the core systems and the supporting IT infrastructure ( the AD domain controllers and e-mail servers, network devices ). Could you please tell me how to deal with the replication servers of core system, AD domain controllers and backup server for e-mail services in Site B and C ?
Answer:
I am not sure if I have understood your question, but you can implement and certify ISO 27001 in your site A without problems, where core systems are. Regarding the backup systems, you can use them for the Disaster Recovery Plan, I mean, if the core systems of the Site A fails, systems of site B and/or C can continue providing all services related to domain controller and email.
So, for this scenario you can use the security controls o f A.17 Information security aspects of business continuity management, of the Annex A of ISO 27001:2013, and for this, our template can be useful for you “Disaster Recovery Plan” (you can see a free version clicking on “Free Demo” tab) : https://advisera.com/27001academy/documentation/disaster-recovery-plan/
By the way, this article about the distance between sites can be also interesting for you “Disaster Recovery site – What is the ideal distance from primary site?” : https://advisera.com/27001academy/knowledgebase/disaster-recovery-site-what-is-the-ideal-distance-from-primary-site/
Finally, our free online course can be also interesting for you, because we talk more in detail about the business continuity “ISO 27001:2013 Foundations Course” : https://advisera.com/training/iso-27001-foundations-course/
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Mar 23, 2016