AUTH-2089: Revise ssh server to function as a proxy

cmd/cloudflared/tunnel/cmd.go

@@ -74,9 +74,6 @@ const (
 	// s3URLFlag is the S3 URL of SSH log uploader (e.g. don't use AWS s3 and use google storage bucket instead)
 	s3URLFlag = "s3-url-host"
 
-	// disablePortForwarding disables both remote and local ssh port forwarding
-	enablePortForwardingFlag = "enable-port-forwarding"
-
 	noIntentMsg = "The --intent argument is required. Cloudflared looks up an Intent to determine what configuration to use (i.e. which tunnels to start). If you don't have any Intents yet, you can use a placeholder Intent Label for now. Then, when you make an Intent with that label, cloudflared will get notified and open the tunnels you specified in that Intent."
 )
 
@@ -399,7 +396,7 @@ func StartServer(c *cli.Context, version string, shutdownC, graceShutdownC chan
 		}
 
 		sshServerAddress := "127.0.0.1:" + c.String(sshPortFlag)
-		server, err := sshserver.New(logManager, logger, version, sshServerAddress, shutdownC, c.Duration(sshIdleTimeoutFlag), c.Duration(sshMaxTimeoutFlag), c.Bool(enablePortForwardingFlag))
+		server, err := sshserver.New(logManager, logger, version, sshServerAddress, shutdownC, c.Duration(sshIdleTimeoutFlag), c.Duration(sshMaxTimeoutFlag))
 		if err != nil {
 			msg := "Cannot create new SSH Server"
 			logger.WithError(err).Error(msg)
@@ -1022,11 +1019,5 @@ func tunnelFlags(shouldHide bool) []cli.Flag {
 			EnvVars: []string{"S3_URL"},
 			Hidden:  true,
 		}),
-		altsrc.NewBoolFlag(&cli.BoolFlag{
-			Name:    enablePortForwardingFlag,
-			Usage:   "Enables remote and local SSH port forwarding",
-			EnvVars: []string{"ENABLE_PORT_FORWARDING"},
-			Hidden:  true,
-		}),
 	}
 }