@Sandesh90031 It is more dependent on what type of infrastructure you have. vCD has no limit on firewall rules specific to OnPrem side. It is mostly dependent on NSX-V or NSX-T that vCD is integrated with.
https://configmax.esp.vmware.com/guest?vmwareproduct=VMware%20NSX&release=NSX-T%20Data%20Center%203....
NSX-T 3.x provides 100000 rules as maximums.
If vCD is integrated with AWS, Then 50000 is the limit.
https://docs.vmware.com/en/VMware-Cloud-Director-service/services/rn/VMware-Cloud-Director-Service-C...
Hope this answers your question.
