April 2018
Intermediate to advanced
418 pages
9h 41m
English
Content preview from Architecting Microsoft Azure Solutions: Exam Guide 70-535
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User Defined Routes
When you create subnets, Azure creates system routes that enable all resources in a subnet to communicate with each other. You can override the system routes by creating UDRs. This way, you can force traffic to follow a particular route.
For instance, you have a network that consists of two subnets and you want to add a VM that is used as a DMZ and has a firewall installed on it. You want traffic only to go through the firewall and not between the two subnets.
To create UDRs and enable IP forwarding, you have to create a routing table in Azure. When this table is created and there are custom routes in there, Azure prefers the custom routes over the default system routes.
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