In a peering group, what is the hard limit for the maximum number of service accounts used per firewall rule?

In a peering group within Google Cloud, each firewall rule can leverage service accounts to define which accounts are allowed or denied access. The maximum limit for the number of service accounts that can be associated with a single firewall rule is indeed 10. This limit ensures that firewall rules remain manageable and that the performance of the network configurations is not adversely affected by an excessive number of service accounts.

By having this cap, Google Cloud ensures that the configurations remain efficient and comprehensible, facilitating network management without over-complicating firewall rule definitions. Organizations often need to balance security needs with operational simplicity, and this limit helps in achieving that by preventing overly complex combinations that could introduce errors or oversights.

Understanding this limit is crucial for network engineers when designing security policies, as they must ensure that the configurations they create fall within specified parameters for proper functionality.