Can a Free Proxy Give You an Incoming Port?

An IP and port from a proxy list usually identify a place your application connects to. They are not a public port reserved for other people to reach your computer.

That distinction matters if you want to receive an incoming connection. An outbound proxy request says, in effect, “please connect to this destination for me.” A public listener requires the intermediary to accept somebody else's connection and associate it with your service.

Look for an actual inbound feature

HTTP CONNECT establishes a tunnel toward the destination named in the request. It does not ask the proxy to publish an arbitrary listening port on your behalf.

SOCKS5 defines a separate BIND command. The protocol's BIND exchange provides a bound endpoint and later reports an incoming connection. That is not the ordinary CONNECT command used by a web client. A service advertising SOCKS5 support may restrict or omit the command; client software must support the intended exchange too.

Even successful BIND negotiation is not a promise of a permanent, general-purpose published port. The service's policy, expected peer, lifetime, and surrounding network path still matter.

An HTTP proxy is not an SSH server

SSH remote forwarding is another way an operator can explicitly provide incoming access. It requires an SSH service, an account, and forwarding permission. Pointing an SSH command at a public HTTP-proxy port cannot create those capabilities.

Before choosing a service, state the direction you need: outbound requests through another exit, or incoming connections to an application you run. If it is the latter, look for a documented inbound-forwarding feature under an arrangement you control. An ordinary proxy-list row does not establish that feature exists.