Manipulating the vCenter Appliance Firewall
Step 1: Log in using the Web Client and click on Home
2. On the left side, click on Administration.
3. On the left side, click on System Configuration.
4. On the left side, click on Nodes; then select your vCenter Server.
5. Click on Firewall.
6. Click on Edit.
7. Click on the "+" Sign to add a firewall rule.
8. Populate the fields to add your firewall rule. Click on Ok.
9. Click on Ok.
10. Done.