VMware Cloud Director 10.6.1
This issue is caused by the stateful firewall not being enabled when the edge gateway is created in the Datacenter Group
This issue is resolved in VMware Cloud Director 10.6.1.1 and is available at Broadcom Downloads.
The workaround available for the the issue is to create the edge gateway with stateful mode enabled in the Organization Virtual Data Center before adding the edge gateway as a part of Datacenter group in VMware Cloud Director UI.
After the edge gateway is created please add the firewall rules to the edge gateway you can then add the edge to a datacenter group.
To verify if the firewall rules are in stateful mode:
Go to NSX Manager UI > Security > Policy Management > Gateway Firewall > Gateway Specific Rules > Gateway Name.
Note: Please be advised that any Edge Gateways created within a Data Center Group and not directly within an Organization Virtual Data Center (OVDC) and then imported to a Data Center Group must be re-deployed in order to enable the creation of firewall rules in stateful mode this also applies to Edge Gateways created prior to upgrading to VMware Cloud Director 10.6.1.1.