networking.nat.forwardPorts.*.sourcePort
NixOS option
Source port of the external interface; to specify a port range, use a string with a colon (e.g. “60000:61000”)
type: signed integer or string matching the pattern [[:digit:]]+:[[:digit:]]+Example
declared in: nixos/modules/services/networking/nat.nixView source on NixOS/nixpkgs →8080