Are outbound requests sent from the instance's public IP?

[greg]

Unfortunately no. So that’s not possible:

Outbound IP Address

Yes that’s the best way to do it! We don’t have stable outbound IPs yet, so IP restrictions are a no go. They’re also pretty brittle and doing wireguard peers is a much better answer for talking to private services.

Sample request thread:

Set/get outgoing IP address for whitelisting on external APIs/Hosts

Hi there, I don’t think this is something that Fly currently does, but is there any way to set an IP address (or a list/range) that a fly app will use to make requests to external hosts? I’d really like to be able to reliably whitelist Fly apps by IP/list/range/whatever. I run reverse proxies, and occasionally one or more Fly IPs will get blacklisted by an external host. Since some requests go out through different Fly IP addresses to the external host, we get an intermittent “sometimes it mak…