1. A method of replicating firewall rules across a plurality of data centers, each data center comprising a set of hosts and a network manager, each host configured to host a set of data compute nodes (DCNs), the method comprising: identifying a first DCN on a host in a primary data center, the first DCN associated with a set of global firewall rules utilizing unique identifiers recognized by the network manager of each data center; allocating storage for a second DCN on a host in a secondary data center to replicate the first DCN; replicating the set of global firewall rules associated with the first DCN into the storage allocated for the second DCN; receiving an indication that the second DCN is powered on; and enforcing the set of global firewall rules for the second DCN using the replicated global firewall rules.