Configuring Public Access

Prerequisites

• You can change the public access setting only when the Kafka instance is in the Running state.
• Kafka instances only support IPv4 EIPs. IPv6 EIPs are not supported.

Enabling Public Network Access

1. Log in to the management console.
2. Click in the upper left corner to select a region.
   

   Select the region where your Kafka instance is located.

3. Click and choose Application > Distributed Message Service for Kafka to open the console of DMS for Kafka.
4. Click a Kafka instance to go to the Basic Information page.
5. Click next to Public Access to enable public access. For Elastic IP Address, select an EIP for each broker and then click .

   You can view the operation progress on the Background Tasks page. If the task status is Successful, the modification has succeeded.

   Figure 1 Enabling public access
   

   After public access is enabled, configure security group rules listed in Table 1 before attempting to access Kafka. For details about accessing Kafka, see Accessing a Kafka Instance.

   Table 1 Security group rules (public network access)

   Direction	Protocol	Port	Source	Description
   Inbound	TCP	9094	0.0.0.0/0	Access Kafka through the public network (without SSL encryption).
   Inbound	TCP	9095	0.0.0.0/0	Access Kafka through the public network (with SSL encryption).

Disabling Public Network Access

1. Log in to the management console.
2. Click in the upper left corner to select a region.
   

   Select the region where your Kafka instance is located.

3. Click and choose Application > Distributed Message Service for Kafka to open the console of DMS for Kafka.
4. Click a Kafka instance to go to the Basic Information page.
5. Click next to Public Access.

   You can view the operation progress on the Background Tasks page. If the task status is Successful, the modification has succeeded.

   After public access is disabled, configure security group rules listed in Table 2 before attempting to access Kafka in a VPC. For details about accessing Kafka, see Accessing a Kafka Instance.

   Table 2 Security group rules (private network access)

   Direction	Protocol	Port	Source	Description
   Inbound	TCP	9092	0.0.0.0/0	Access a Kafka instance within a VPC (without SSL encryption).
   Inbound	TCP	9093	0.0.0.0/0	Access a Kafka instance within a VPC (with SSL encryption).

   

   After a security group is created, its default inbound rule allows communication among ECSs within the security group and its default outbound rule allows all outbound traffic. In this case, you can access a Kafka instance within a VPC, and do not need to add rules according to Table 2.