Ability to change the ssh port forwarding interface

.web-docs/components/builder/iso/README.md

@@ -862,6 +862,8 @@ used to do things such as set RAM, CPUs, etc.
   does not setup forwarded port mapping for communicator (SSH or WinRM) requests and uses ssh_port or winrm_port
   on the host to communicate to the virtual machine.
 
+- `ssh_listen_address` (string) - The address where the SSH port forwarding will be set to listen on. This value defaults to `127.0.0.1`.
+
 <!-- End of code generated from the comments of the CommConfig struct in builder/virtualbox/common/comm_config.go; -->
 
 

.web-docs/components/builder/ovf/README.md

@@ -623,6 +623,8 @@ boot time.
   does not setup forwarded port mapping for communicator (SSH or WinRM) requests and uses ssh_port or winrm_port
   on the host to communicate to the virtual machine.
 
+- `ssh_listen_address` (string) - The address where the SSH port forwarding will be set to listen on. This value defaults to `127.0.0.1`.
+
 <!-- End of code generated from the comments of the CommConfig struct in builder/virtualbox/common/comm_config.go; -->
 
 

.web-docs/components/builder/vm/README.md

@@ -640,6 +640,8 @@ boot time.
   does not setup forwarded port mapping for communicator (SSH or WinRM) requests and uses ssh_port or winrm_port
   on the host to communicate to the virtual machine.
 
+- `ssh_listen_address` (string) - The address where the SSH port forwarding will be set to listen on. This value defaults to `127.0.0.1`.
+
 <!-- End of code generated from the comments of the CommConfig struct in builder/virtualbox/common/comm_config.go; -->
 
 

builder/virtualbox/common/comm_config.go

@@ -26,6 +26,8 @@ type CommConfig struct {
 	// does not setup forwarded port mapping for communicator (SSH or WinRM) requests and uses ssh_port or winrm_port
 	// on the host to communicate to the virtual machine.
 	SkipNatMapping bool `mapstructure:"skip_nat_mapping" required:"false"`
+	// The address where the SSH port forwarding will be set to listen on. This value defaults to `127.0.0.1`.
+	SSHListenAddress string `mapstructure:"ssh_listen_address" required:"false"`
 
 	// These are deprecated, but we keep them around for backwards compatibility
 	// TODO: remove later
@@ -72,5 +74,9 @@ func (c *CommConfig) Prepare(ctx *interpolate.Context) []error {
 			errors.New("host_port_min must be less than host_port_max"))
 	}
 
+	if c.SSHListenAddress == "" {
+		c.SSHListenAddress = "127.0.0.1"
+	}
+
 	return errs
 }

builder/virtualbox/common/step_port_forwarding.go

@@ -28,10 +28,11 @@ import (
 //
 // Produces:
 type StepPortForwarding struct {
-	CommConfig     *communicator.Config
-	HostPortMin    int
-	HostPortMax    int
-	SkipNatMapping bool
+	CommConfig       *communicator.Config
+	HostPortMin      int
+	HostPortMax      int
+	SkipNatMapping   bool
+	SSHListenAddress string
 
 	l *net.Listener
 }
@@ -133,10 +134,11 @@ func (s *StepPortForwarding) Run(ctx context.Context, state multistep.StateBag)
 
 		// Create a forwarded port mapping to the VM
 		ui.Say(fmt.Sprintf("Creating forwarded port mapping for communicator (SSH, WinRM, etc) (host port %d)", commHostPort))
+
 		command = []string{
 			"modifyvm", vmName,
 			"--natpf1",
-			fmt.Sprintf("packercomm,tcp,127.0.0.1,%d,,%d", commHostPort, guestPort),
+			fmt.Sprintf("packercomm,tcp,%s,%d,,%d", s.SSHListenAddress, commHostPort, guestPort),
 		}
 		retried := false
 	retry:

builder/virtualbox/iso/builder.go

@@ -431,10 +431,11 @@ func (b *Builder) Run(ctx context.Context, ui packersdk.Ui, hook packersdk.Hook)
 		},
 		new(vboxcommon.StepAttachFloppy),
 		&vboxcommon.StepPortForwarding{
-			CommConfig:     &b.config.CommConfig.Comm,
-			HostPortMin:    b.config.HostPortMin,
-			HostPortMax:    b.config.HostPortMax,
-			SkipNatMapping: b.config.SkipNatMapping,
+			CommConfig:       &b.config.CommConfig.Comm,
+			HostPortMin:      b.config.HostPortMin,
+			HostPortMax:      b.config.HostPortMax,
+			SkipNatMapping:   b.config.SkipNatMapping,
+			SSHListenAddress: b.config.SSHListenAddress,
 		},
 		&vboxcommon.StepVBoxManage{
 			Commands: b.config.VBoxManage,

builder/virtualbox/ovf/builder.go

@@ -107,10 +107,11 @@ func (b *Builder) Run(ctx context.Context, ui packersdk.Ui, hook packersdk.Hook)
 		},
 		new(vboxcommon.StepAttachFloppy),
 		&vboxcommon.StepPortForwarding{
-			CommConfig:     &b.config.CommConfig.Comm,
-			HostPortMin:    b.config.HostPortMin,
-			HostPortMax:    b.config.HostPortMax,
-			SkipNatMapping: b.config.SkipNatMapping,
+			CommConfig:       &b.config.CommConfig.Comm,
+			HostPortMin:      b.config.HostPortMin,
+			HostPortMax:      b.config.HostPortMax,
+			SkipNatMapping:   b.config.SkipNatMapping,
+			SSHListenAddress: b.config.SSHListenAddress,
 		},
 		&vboxcommon.StepVBoxManage{
 			Commands: b.config.VBoxManage,

builder/virtualbox/vm/builder.go

@@ -91,10 +91,11 @@ func (b *Builder) Run(ctx context.Context, ui packersdk.Ui, hook packersdk.Hook)
 		},
 		new(vboxcommon.StepAttachFloppy),
 		&vboxcommon.StepPortForwarding{
-			CommConfig:     &b.config.CommConfig.Comm,
-			HostPortMin:    b.config.HostPortMin,
-			HostPortMax:    b.config.HostPortMax,
-			SkipNatMapping: b.config.SkipNatMapping,
+			CommConfig:       &b.config.CommConfig.Comm,
+			HostPortMin:      b.config.HostPortMin,
+			HostPortMax:      b.config.HostPortMax,
+			SkipNatMapping:   b.config.SkipNatMapping,
+			SSHListenAddress: b.config.SSHListenAddress,
 		},
 		&vboxcommon.StepVBoxManage{
 			Commands: b.config.VBoxManage,

docs-partials/builder/virtualbox/common/CommConfig-not-required.mdx

@@ -12,4 +12,6 @@
   does not setup forwarded port mapping for communicator (SSH or WinRM) requests and uses ssh_port or winrm_port
   on the host to communicate to the virtual machine.
 
+- `ssh_listen_address` (string) - The address where the SSH port forwarding will be set to listen on. This value defaults to `127.0.0.1`.
+
 <!-- End of code generated from the comments of the CommConfig struct in builder/virtualbox/common/comm_config.go; -->