To delete a rule from a security group, follow these steps:
- go to the details page of the VPC Network containing the security group with the rule you want to delete;
- the Security Group section contains a list of the security groups connected with the VPC Network;
- find the one you are looking for and click on the three dots ... at the end of the line;
- select Manage Security Group from the list of options;
- this will take you to the security group details page;
- choose Inbound rules or Outboung rules, depending on the rule you want to delete;
- a list of the rules configured will be displayed;
- find the one you are looking for and click on the three dots ... at the end of the line;
- select Delete rule from the list of options;
- the Delete rule pop up will open, asking you to confirm;
- click on the Delete rule button to finish.