ginuerzh/gost · error

accpet on closed listener

Error message

accpet on closed listener

What it means

Returned by sshTunnelListener.Accept when its errChan is closed and no value was received — the tunnel's error channel has been shut down, so the listener can no longer produce connections or errors. It is the sentinel for accept-after-close on the SSH tunnel listener (note the misspelling 'accpet' in the message).

Source

Thrown at ssh.go:835

			default:
				log.Log("[ssh] Unknown channel type:", t)
				newChannel.Reject(ssh.UnknownChannelType, fmt.Sprintf("unknown channel type: %s", t))
			}
		}
	}()

	log.Logf("[ssh] %s <-> %s", conn.RemoteAddr(), conn.LocalAddr())
	sc.Wait()
	log.Logf("[ssh] %s >-< %s", conn.RemoteAddr(), conn.LocalAddr())
}

func (l *sshTunnelListener) Accept() (conn net.Conn, err error) {
	var ok bool
	select {
	case conn = <-l.connChan:
	case err, ok = <-l.errChan:
		if !ok {
			err = errors.New("accpet on closed listener")
		}
	}
	return
}

// directForward is structure for RFC 4254 7.2 - can be used for "forwarded-tcpip" and "direct-tcpip"
type directForward struct {
	Host1 string
	Port1 uint32
	Host2 string
	Port2 uint32
}

func (p directForward) String() string {
	return fmt.Sprintf("%s:%d -> %s:%d", p.Host2, p.Port2, p.Host1, p.Port1)
}

func getHostPortFromAddr(addr net.Addr) (host string, port int, err error) {

View on GitHub (pinned to a33fdbf4c9)

Solutions

1. Stop calling Accept after the tunnel listener is closed
2. Re-establish the SSH tunnel and create a new listener if forwarding must continue
3. Propagate the error so callers shut down their accept loops cleanly

When it happens

Trigger: Thrown at ssh.go:835 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of ginuerzh/gost@a33fdbf4c9 (2026-09-02). Data as JSON: /api/errors/c9ebf7078d2604ab. Report an issue: GitHub.