specified security group and reachable from within the private subnet even if

Specified security group and reachable from within

This preview shows page 269 - 271 out of 395 pages.

specified security group and reachable from within the private subnet, even if the instances are in different clusters. HTTPS (8443) TCP 8443 The Group ID of the managed security group for service access in a private subnet. This rule allows the cluster manager to communicate with the master node. Amazon EMR-Managed Security Group for Core and Task Instances (Private Subnets) The default managed security group for core and task instances in private subnets has the Group Name of ElasticMapReduce-Slave-Private . The default managed security group has the following rules, and Amazon EMR adds the same rules if you specify a custom managed security group. Type Protocol Port Range Source Details Inbound rules All ICMP- IPV4 All N/A All TCP TCP All All UDP UDP All The Group ID of the managed security group for core and task instances. In other words, the same security group in which the rule appears. These reflexive rules allow inbound traffic from any instance associated with the specified security group. Using the default ElasticMapReduce-slave for multiple clusters allows the core and task instances of those clusters to communicate with each other over ICMP or any TCP or UDP port. Specify custom managed security groups to restrict cross-cluster access. All ICMP- IPV4 All N/A All TCP TCP All All UDP UDP All The Group ID of the managed security group for the master instance. These rules allow all inbound ICMP traffic and traffic over any TCP or UDP port from any master instances that are associated with the specified security group, even if the instances are in different clusters. HTTPS (8443) TCP 8443 The Group ID of the managed security group for service access in a private subnet. This rule allows the cluster manager to communicate with core and task nodes. Amazon EMR-Managed Security Group for Service Access (Private Subnets) The default managed security group for service access in private subnets has the Group Name of ElasticMapReduce-ServiceAccess . It has no inbound rules, and outbound rules that allow traffic over HTTPS (port 8443) to the other managed security groups in private subnets. These rules allow the cluster 263
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Amazon EMR Management Guide Working With Additional Security Groups manager to communicate with the master node and with core and task nodes. The same rules are added if you specify a custom security group. Working With Additional Security Groups Whether you use the default managed security groups or specify custom managed security groups, you can use additional security groups. Additional security groups give you the flexibility to tailor access between different clusters and from external clients, resources, and applications. Consider the following scenario as an example. You have multiple clusters that you need to communicate with each other, but you want to allow inbound SSH access to the master instance for only a particular subset of clusters. To do this, you can use the same set of managed security groups for the clusters. You
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  • Spring '12
  • LauraParker
  • Amazon Web Services, Amazon Elastic Compute Cloud

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