Before you can run VMs in another compartment's VCN, you must first create a public subnet in your VCN with security rules that allow inbound access from and outbound access to VB Studio.

1. Sign in to Oracle Cloud Console.
2. In the upper-left corner, click Navigation Menu .
3. Select Networking and then select Virtual cloud networks.
4. On the Virtual Cloud Networks page, next to Applied filters, select the compartment.
5. From the VCNs list, click the VCN's name.
6. On the VCN details page, click the Security tab.
7. Under Security Lists, click Create Security List.
8. On the Create Security List page, in Name, enter the security list name.
9. In Create in Compartment, ensure that the correct compartment is selected.
10. In Allow Rules for Ingress, click + Another Ingress Rule and follow these steps:
    1. In Source Type, select CIDR.
    2. In Source CIDR, enter 0.0.0.0/0.
    3. In Destination Port Range, enter 9082.
    4. (Optional) In Description, add a description.
       Here's an example:
       

       
       Description of the illustration vcn-create-ingress-rule.png

       
       
    5. Click + Another Ingress Rule and repeat steps 10a through 10d to add ports 9085 and 22.
    6. (Only if you are using Docker executors) Click + Another Ingress Rule and repeat steps 10a through 10d to add ports 8095 and 9001-9010 to 0.0.0.0/0 and add port 443 to your VCN CIDR (for example 10.0.0.0/16).
11. In Allow Rules for Egress, click + Another Egress Rule and follow these steps:
    1. In Destination Type, select CIDR.
    2. In Destination CIDR, enter 0.0.0.0/0.
    3. In IP Protocol, select All Protocols.
    4. (Optional) In Description, add a description.
12. Click Create Security List.
    After creating the security list, click its name and then click the Security rules tab to verify the ingress and egress rules you added.

    Here's an example of ingress rules:

    
    

    
    Description of the illustration vcn-edit-ingress-rules-list.png

    
    

    Here's an example of the egress rule:

    
    

    
    Description of the illustration vcn-edit-egress-rules-list.png

    
    
13. Return to the VCN's details page.
14. Select the Subnets tab and follow these steps to create a public subnet:
    If you want to edit an existing public subnet, jump to the next step.
    1. Click Create Subnet.
    2. In Name, enter the subnet's name.
    3. In Create in Compartment, select the correct compartment.
    4. In Subnet Type, make sure that Regional is selected.
    5. In IPv4 CIDR Block, enter the subnet's CIDR block.
       Don't set it to 172.17.0.0/16 as it's the default subnet allocated to Docker.
    6. Under IPv6 Prefixes, in Route Table, select the VCN's route table.
    7. In Subnet Access, make sure that Public Subnet is selected.
    8. In Dhcp Options, select the VCN's DHCP options.
    9. In Security List, select the security list you created starting with step 6.
    10. Fill in the other fields as required.
    11. Click Create Subnet.
15. If you want to edit an existing subnet, select the Subnets tab and then follow these steps:
    1. Click the public subnet's name.
    2. Click the Security tab and then click Add Security List.
    3. On the Add Security List page, in Security List, select the security list you created starting with step 6.
    4. Click Add Security List.