Network considerations for multi-region object deployment

To communicate with nodes in other regions, the Swift services connect to the network addresses as defined in the ring files, which are the CES IP addresses. This means that every node must be able to connect to all CES IPs in all regions.

Ensure that the network routing is properly set up to enable the connections. Ensure that the necessary firewall configuration is done to allow connection to the object, account, and container servers (typically ports 6200, 6201, and 6202) on all nodes in all regions. Swift uses rsync to replicate data between regions, so the rsync port 873 also needs to be opened between the regions.