Outbound connectivity from VMs

How outbound connectivity from a VM to external hosts outside of the Flying Circus works depends on the network configuration for that VM:

• VMs can always connect to remote IPv6 destinations directly, as all VMs are assigned public IPv6 addresses.

• If a VM has a public IPv4 address, then it can connect to remote IPv4 destinations directly.

• If a VM does not have a public IPv4 address available, then we perform network address translation (NAT) on our site border routers, to ensure that a public address is used as the source address of connections outside of our network.

We use a fixed set of addresses as NAT source addresses for outbound IPv4 connections in each location.

• RZOB (Production datacenter):

  • 195.62.112.82

  • 195.62.112.83

  • 195.62.112.90

  • 195.62.112.91

• WHQ (Backup and staging datacenter):

  • 213.187.81.2