How are you handling outgoing IP address whitelisting

[yup]

For anyone finding their way here:

• Assign Static Egress IP
• Static Egress IP Management

Static egress IPs for machines

You can now assign static egress IPs to your machines.! Although most apps don’t need it, it is useful when using services like MongoDB atlas that require allowlisting a range of IPs. You can allocate static egress IPs to your machine by running fly machine egress-ip allocate <machine ID>. These IPs survive machine migration and are not shared between machines. Static egress IPs for machines will cost $0.005 per hour.