Create a rule for TCP or UDP traffic

Last update: February 24 2025

Create a rule for TCP or UDP traffic

Control panel

1. In control panel from the top menu, press Products and select Cloud servers.

2. Go to the section Balancers → tab Balancers.

3. Open the balancer page.

4. Click Create a rule.

5. Select the protocol for receiving traffic — TCP or UDP.

6. For the selected protocol, the default port on which the balancer will listen to traffic will be automatically selected — change it if necessary.

7. Select a target group or create a new target group suitably protocol.

8. Optional: change connection settings To do this, open the block Advanced rule settings and specify:

   • for incoming requests to the balancer — specify the connection timeout and maximum connections;
   • for requests from the balancer to servers — specify the connection timeout, inactivity timeout and TCP packet waiting timeout.

9. Click Create.

OpenStack CLI

1. Open the OpenStack CLI.

2. Create a rule for the balancer:

   openstack loadbalancer listener create \
     --name <listener_name> \
     --protocol <protocol> \
     --protocol-port <port> \
     <loadbalancer>

   Specify:

   • <listener_name> — NAME OF RULE;
   • <protocol> — protocol name, TCP or UDP;
   • <port> — port number;
   • <loadbalancer> — ID or name of the load balancer. You can view the list using the command openstack loadbalancer list.

3. Create a task force:

   openstack loadbalancer pool create \
     --name <pool_name> \
     --lb-algorithm <algorithm> \
     --listener <listener_name> \
     --protocol <protocol>

   Specify:

   • <pool_name> — the name of the target group;
   • <algorithm> — algorithm name: ROUND_ROBIN or LEAST_CONNECTIONS;
   • <listener_name> — NAME OF RULE;
   • <protocol> — protocol name.

4. Add the server to the target group:

   openstack loadbalancer member create \
     --subnet-id <subnet_uuid> \
     --address <server_ip_address> \
     --protocol-port <port> \
     <pool_name>

   Specify:

   • <subnet_uuid> — The ID of the private or public subnet of the server can be viewed with the command openstack subnet list;
   • <server_ip_address> — The IP address of the server from the specified subnet.