GloballyReachable checks if UDP port is reachable from global Internet, performing probe against asymmetric UDP echo server.

NewFixedRangePool creates a fixed size pool from port.Range.

ParseRange parses port range expression, e.g.

ErrEmptyServerAddressList indicates there are no servers to get response from.

Pool hands out ports for service use.

Range represents a networking port range.

ServicePortSupplier provides port needed to run a service on.

Port (networking).