Class: Yast::SuSEFirewallProposalClass

Inherits:
Module
  • Object
show all
Defined in:
../../src/modules/SuSEFirewallProposal.rb

Instance Method Summary (collapse)

Instance Method Details

- (Object) AddWarning(warning)

Local function adds another warning string into warnings for user

Parameters:

  • warning (String)


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# File '../../src/modules/SuSEFirewallProposal.rb', line 78

def AddWarning(warning)
  @warnings_now = Builtins.add(@warnings_now, warning)

  nil
end

- (Object) ClearWarnings

Local function clears all warnings for user from memory



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# File '../../src/modules/SuSEFirewallProposal.rb', line 85

def ClearWarnings
  @warnings_now = []

  nil
end

- (Object) EnableFallbackPorts(fallback_ports, zones)

Enables ports in zones.

Parameters:

  • list (string)

    fallback TCP ports

  • zones (Array<String>)


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# File '../../src/modules/SuSEFirewallProposal.rb', line 234

def EnableFallbackPorts(fallback_ports, zones)
  fallback_ports = deep_copy(fallback_ports)
  zones = deep_copy(zones)
  Builtins.y2warning(
    "Enabling fallback ports: %1 in zones: %2",
    fallback_ports,
    zones
  )

  Builtins.foreach(zones) { |one_zone| Builtins.foreach(fallback_ports) do |one_port|
    SuSEFirewall.AddService(one_port, "TCP", one_zone)
  end }

  nil
end

- (Boolean) GetChangedByUser

Local function returns if proposal was changed by user

Returns:

  • (Boolean)

    if proposal was changed by user



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# File '../../src/modules/SuSEFirewallProposal.rb', line 490

def GetChangedByUser
  @proposal_changed_by_user
end

- (Array<String>) GetKnownInterfaces

Local function returns list [string] of known interfaces. They must have been set using SetKnownInterfaces(list [string] interfaces) function.

Returns:

  • (Array<String>)

    of known interfaces



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# File '../../src/modules/SuSEFirewallProposal.rb', line 113

def GetKnownInterfaces
  deep_copy(@known_interfaces)
end

- (Boolean) GetProposalInitialized

Local function returns if proposal was initialized already

Returns:

  • (Boolean)

    if proposal was initialized



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# File '../../src/modules/SuSEFirewallProposal.rb', line 506

def GetProposalInitialized
  @proposal_initialized
end

- (Array<String>) GetWarnings

Function returns list of warnings for user

Returns:

  • (Array<String>)

    of warnings



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# File '../../src/modules/SuSEFirewallProposal.rb', line 94

def GetWarnings
  deep_copy(@warnings_now)
end

- (Boolean) IsDialUpInterface(interface)

Function returns if interface is a dial-up type.

Returns:

  • (Boolean)

    if is dial-up interface



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# File '../../src/modules/SuSEFirewallProposal.rb', line 120

def IsDialUpInterface(interface)
  all_interfaces = SuSEFirewall.GetAllKnownInterfaces

  interface_type = nil
  Builtins.foreach(all_interfaces) do |one|
    next if Ops.get(one, "id") != interface
    # this is THE interface
    interface_type = Ops.get(one, "type")
  end

  interface_type == "dialup"
end

- (Object) IsServiceOrPortsOpen(service, fallback_ports)

Checks whether the given service or (TCP) ports are open at least in one FW zone.

Parameters:

  • service, (String)

    e.g., “service:http-server”

  • fallback_ports, (Array<String>)

    e.g., [“80”]



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# File '../../src/modules/SuSEFirewallProposal.rb', line 286

def IsServiceOrPortsOpen(service, fallback_ports)
  fallback_ports = deep_copy(fallback_ports)
  ret = false

  Builtins.foreach(SuSEFirewall.GetKnownFirewallZones) do |zone|
    # either service is supported
    if SuSEFirewall.IsServiceSupportedInZone(service, zone)
      ret = true 
      # or check for ports
    else
      all_ports = true

      # all ports have to be open
      Builtins.foreach(fallback_ports) do |port|
        if !SuSEFirewall.HaveService(port, "TCP", zone)
          all_ports = false
          raise Break
        end
      end

      ret = true if all_ports
    end
    raise Break if ret == true
  end

  ret
end

- (Boolean) IsXenInstalled

Local function returns whether the Xen kernel is installed

Returns:

  • (Boolean)

    whether xen-capable kernel is installed.



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# File '../../src/modules/SuSEFirewallProposal.rb', line 353

def IsXenInstalled
  # bug #154133
  return true if Package.Installed("kernel-xen")
  return true if Package.Installed("kernel-xenpae")

  false
end

- (Object) main



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# File '../../src/modules/SuSEFirewallProposal.rb', line 36

def main
  textdomain "base"

  Yast.import "SuSEFirewall"
  Yast.import "ProductFeatures"
  Yast.import "Linuxrc"
  Yast.import "Package"
  Yast.import "SuSEFirewallServices"

  # <!-- SuSEFirewall LOCAL VARIABLES //-->

  # proposal was changed by user
  @proposal_changed_by_user = false

  # proposal was initialized yet
  @proposal_initialized = false

  # known interfaces
  @known_interfaces = []

  # warnings for this "turn"
  @warnings_now = []

  @vnc_fallback_ports = ["5801", "5901"]

  # bnc #427708, yet another name of service
  @vnc_service = "service:xorg-x11-server"

  @ssh_service = "service:sshd"

  @iscsi_target_service = "service:iscsitarget"

  @iscsi_target_fallback_ports = ["iscsi-target"]
end

- (Object) OpenServiceInInterfaces(service, fallback_ports, interfaces)

Function opens service for network interfaces given as the third parameter. Fallback ports are used if the given service is uknown.

Parameters:

  • service, (String)

    e.g., “service:http-server”

  • fallback_ports, (Array<String>)

    e.g., [“80”]

  • interfaces, (Array<String>)

    e.g., [“eth3”]

See Also:

  • for more info.


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# File '../../src/modules/SuSEFirewallProposal.rb', line 258

def OpenServiceInInterfaces(service, fallback_ports, interfaces)
  fallback_ports = deep_copy(fallback_ports)
  interfaces = deep_copy(interfaces)
  zones = SuSEFirewall.GetZonesOfInterfaces(interfaces)

  if SuSEFirewallServices.IsKnownService(service)
    Builtins.y2milestone(
      "Opening service %1 on interfaces %2 (zones %3)",
      service,
      interfaces,
      zones
    )
    SuSEFirewall.SetServicesForZones([service], zones, true)
  end

  if SuSEFirewallServices.IsKnownService(service) != true ||
      ServiceEnabled(service, interfaces) != true
    EnableFallbackPorts(fallback_ports, interfaces)
  end

  nil
end

- (Object) OpenServiceOnNonDialUpInterfaces(service, fallback_ports)

Function opens up the service on all non-dial-up network interfaces. If there are no network interfaces known and the 'any' feature is supported, function opens the service for the zone supporting that feature. If there are only dial-up interfaces, function opens the service for them.

Parameters:

  • service (String)

    such as “service:koo” or “serice:boo”

  • list (string)

    list of ports used as a fallback if the given service doesn't exist



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# File '../../src/modules/SuSEFirewallProposal.rb', line 321

def OpenServiceOnNonDialUpInterfaces(service, fallback_ports)
  fallback_ports = deep_copy(fallback_ports)
  non_dial_up_interfaces = SuSEFirewall.GetAllNonDialUpInterfaces
  dial_up_interfaces = SuSEFirewall.GetAllDialUpInterfaces

  # Opening the service for non-dial-up interfaces
  if Ops.greater_than(Builtins.size(non_dial_up_interfaces), 0)
    OpenServiceInInterfaces(service, fallback_ports, non_dial_up_interfaces) 
    # Only dial-up network interfaces, there mustn't be any non-dial-up one
  elsif Ops.greater_than(Builtins.size(dial_up_interfaces), 0)
    OpenServiceInInterfaces(service, fallback_ports, dial_up_interfaces) 
    # No network interfaces are known
  elsif Builtins.size(@known_interfaces) == 0
    if SuSEFirewall.IsAnyNetworkInterfaceSupported == true
      Builtins.y2warning(
        "WARNING: Opening %1 for the External zone without any known interface!",
        Builtins.toupper(service)
      )
      OpenServiceInInterfaces(
        service,
        fallback_ports,
        [SuSEFirewall.special_all_interface_string]
      )
    end
  end

  nil
end

- (Hash{String => String}) ProposalSummary

Function returns the proposal summary

Structure:

map 

Returns:

  • (Hash{String => String})

    proposal



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# File '../../src/modules/SuSEFirewallProposal.rb', line 555

def ProposalSummary
  # output: $[ "output" : "HTML Proposal", "warning" : "HTML Warning" ];
  output = ""
  warning = ""

  # SuSEfirewall2 package needn't be installed
  if !SuSEFirewall.SuSEFirewallIsInstalled
    # TRANSLATORS: Proposal informative text
    output = "<ul>" +
      _(
        "SuSEfirewall2 package is not installed, firewall will be disabled."
      ) + "</ul>"

    return { "output" => output, "warning" => warning }
  end

  # SuSEfirewall2 is installed...

  firewall_is_enabled = SuSEFirewall.GetEnableService == true

  output = Ops.add(output, "<ul>\n")
  output = Ops.add(
    Ops.add(
      Ops.add(output, "<li>"),
      firewall_is_enabled ?
        # TRANSLATORS: Proposal informative text "Firewall is enabled (disable)" with link around
        # IMPORTANT: Please, do not change the HTML link <a href="...">...</a>, only visible text
        _(
          "Firewall is enabled (<a href=\"firewall--disable_firewall_in_proposal\">disable</a>)"
        ) :
        # TRANSLATORS: Proposal informative text "Firewall is disabled (enable)" with link around
        # IMPORTANT: Please, do not change the HTML link <a href="...">...</a>, only visible text
        _(
          "Firewall is disabled (<a href=\"firewall--enable_firewall_in_proposal\">enable</a>)"
        )
    ),
    "</li>\n"
  )

  if firewall_is_enabled
    # Any enabled SSH means SSH-is-enabled
    is_ssh_enabled = false

    # Any known interfaces
    if Ops.greater_than(Builtins.size(@known_interfaces), 0)
      Builtins.y2milestone("Interfaces: %1", @known_interfaces)

      # all known interfaces for testing
      used_zones = SuSEFirewall.GetZonesOfInterfacesWithAnyFeatureSupported(
        @known_interfaces
      )
      Builtins.y2milestone("Zones used by firewall: %1", used_zones)

      Builtins.foreach(used_zones) do |zone|
        if SuSEFirewall.IsServiceSupportedInZone(@ssh_service, zone) ||
            SuSEFirewall.HaveService("ssh", "TCP", zone)
          is_ssh_enabled = true
        end
      end

      output = Ops.add(
        Ops.add(
          Ops.add(output, "<li>"),
          is_ssh_enabled ?
            # TRANSLATORS: Network proposal informative text with link around
            # IMPORTANT: Please, do not change the HTML link <a href="...">...</a>, only visible text
            _(
              "SSH port is open (<a href=\"firewall--disable_ssh_in_proposal\">close</a>)"
            ) :
            # TRANSLATORS: Network proposal informative text with link around
            # IMPORTANT: Please, do not change the HTML link <a href="...">...</a>, only visible text
            _(
              "SSH port is blocked (<a href=\"firewall--enable_ssh_in_proposal\">open</a>)"
            )
        ),
        "</li>\n"
      ) 

      # No known interfaces, but 'any' is supported
      # and ssh is enabled there
    elsif SuSEFirewall.IsAnyNetworkInterfaceSupported &&
        SuSEFirewall.IsServiceSupportedInZone(
          @ssh_service,
          SuSEFirewall.special_all_interface_zone
        )
      is_ssh_enabled = true
      # TRANSLATORS: Network proposal informative text with link around
      # IMPORTANT: Please, do not change the HTML link <a href="...">...</a>, only visible text
      output = Ops.add(
        Ops.add(
          Ops.add(output, "<li>"),
          _(
            "SSH port is open (<a href=\"firewall--disable_ssh_in_proposal\">close</a>), but\nthere are no network interfaces configured"
          )
        ),
        "</li>"
      )
    end
    Builtins.y2milestone(
      "SSH is " + (is_ssh_enabled ? "" : "not ") + "enabled"
    )

    if Linuxrc.usessh
      if !is_ssh_enabled
        # TRANSLATORS: This is a warning message. Installation over SSH without SSH allowed on firewall
        AddWarning(
          _(
            "You are installing a system over SSH, but you have not opened the SSH port on the firewall."
          )
        )
      end
    end

    # when the firewall is enabled and we are installing the system over VNC
    if Linuxrc.vnc
      # Any enabled VNC means VNC-is-enabled
      is_vnc_enabled = false
      if Ops.greater_than(Builtins.size(@known_interfaces), 0)
        Builtins.foreach(
          SuSEFirewall.GetZonesOfInterfacesWithAnyFeatureSupported(
            @known_interfaces
          )
        ) do |zone|
          if SuSEFirewall.IsServiceSupportedInZone(@vnc_service, zone) == true
            is_vnc_enabled = true 
            # checking also fallback ports
          else
            set_vnc_enabled_to = true
            Builtins.foreach(@vnc_fallback_ports) do |one_port|
              if SuSEFirewall.HaveService(one_port, "TCP", zone) != true
                set_vnc_enabled_to = false
                raise Break
              end
              is_vnc_enabled = true if set_vnc_enabled_to == true
            end
          end
        end
      end
      Builtins.y2milestone(
        "VNC port is " + (is_vnc_enabled ? "open" : "blocked") + " in the firewall"
      )

      output = Ops.add(
        Ops.add(
          Ops.add(output, "<li>"),
          is_vnc_enabled ?
            # TRANSLATORS: Network proposal informative text "Remote Administration (VNC) is enabled" with link around
            # IMPORTANT: Please, do not change the HTML link <a href="...">...</a>, only visible text
            _(
              "Remote Administration (VNC) ports are open (<a href=\"firewall--disable_vnc_in_proposal\">close</a>)"
            ) :
            # TRANSLATORS: Network proposal informative text "Remote Administration (VNC) is disabled" with link around
            # IMPORTANT: Please, do not change the HTML link <a href="...">...</a>, only visible text
            _(
              "Remote Administration (VNC) ports are blocked (<a href=\"firewall--enable_vnc_in_proposal\">open</a>)"
            )
        ),
        "</li>\n"
      )

      if !is_vnc_enabled
        # TRANSLATORS: This is a warning message. Installation over VNC without VNC allowed on firewall
        AddWarning(
          _(
            "You are installing a system using remote administration (VNC), but you have not opened the VNC ports on the firewall."
          )
        )
      end
    end

    if Linuxrc.useiscsi
      is_iscsi_enabled = IsServiceOrPortsOpen(
        @iscsi_target_service,
        @iscsi_target_fallback_ports
      )

      output = Ops.add(
        Ops.add(
          Ops.add(output, "<li>"),
          is_iscsi_enabled ?
            # TRANSLATORS: Network proposal informative text
            _("iSCSI Target ports are open") :
            # TRANSLATORS: Network proposal informative text
            _("iSCSI Target ports are blocked")
        ),
        "</li>\n"
      )

      if !is_iscsi_enabled
        # TRANSLATORS: This is a warning message. Installation to iSCSI without iSCSI allowed on firewall
        AddWarning(
          _(
            "You are installing a system using iSCSI Target, but you have not opened the needed ports on the firewall."
          )
        )
      end
    end

    warnings_strings = GetWarnings()
    if Ops.greater_than(Builtins.size(warnings_strings), 0)
      ClearWarnings()
      Builtins.foreach(warnings_strings) do |single_warning|
        warning = Ops.add(
          Ops.add(Ops.add(warning, "<li>"), single_warning),
          "</li>\n"
        )
      end
      warning = Ops.add(Ops.add("<ul>\n", warning), "</ul>\n")
    end
  end

  output = Ops.add(output, "</ul>\n")

  { "output" => output, "warning" => warning }
end

- (void) Propose

This method returns an undefined value.

Function proposes the SuSEfirewall2 configuration



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# File '../../src/modules/SuSEFirewallProposal.rb', line 523

def Propose
  # No proposal when SuSEfirewall2 is not installed
  if !SuSEFirewall.SuSEFirewallIsInstalled
    SuSEFirewall.SetEnableService(false)
    SuSEFirewall.SetStartService(false)
    return nil
  end

  # Not changed by user - Propose from scratch
  if !GetChangedByUser()
    Builtins.y2milestone("Calling firewall configuration proposal")
    Reset()
    ProposeFunctions() 
    # Changed - don't break user's configuration
  else
    Builtins.y2milestone("Calling firewall configuration update proposal")
    UpdateProposal()
  end

  nil
end

- (Object) ProposeFunctions

Local function for proposing firewall configuration.



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# File '../../src/modules/SuSEFirewallProposal.rb', line 362

def ProposeFunctions
  known_interfaces = SuSEFirewall.GetAllKnownInterfaces

  dial_up_interfaces = []
  non_dup_interfaces = []
  Builtins.foreach(known_interfaces) do |interface|
    if Ops.get(interface, "type") == "dial_up"
      dial_up_interfaces = Builtins.add(
        dial_up_interfaces,
        Ops.get(interface, "id", "")
      )
    else
      non_dup_interfaces = Builtins.add(
        non_dup_interfaces,
        Ops.get(interface, "id", "")
      )
    end
  end

  Builtins.y2milestone(
    "Proposal based on configuration: Dial-up interfaces: %1, Other: %2",
    dial_up_interfaces,
    non_dup_interfaces
  )

  # has any network interface
  if Builtins.size(non_dup_interfaces) == 0 ||
      Builtins.size(dial_up_interfaces) == 0
    SuSEFirewall.SetEnableService(
      ProductFeatures.GetBooleanFeature("globals", "enable_firewall")
    )
    SuSEFirewall.SetStartService(
      ProductFeatures.GetBooleanFeature("globals", "enable_firewall")
    )
  end

  # has non-dial-up and also dial-up interfaces
  if Ops.greater_than(Builtins.size(non_dup_interfaces), 0) &&
      Ops.greater_than(Builtins.size(dial_up_interfaces), 0)
    SetInterfacesToZone(non_dup_interfaces, "INT")
    SetInterfacesToZone(dial_up_interfaces, "EXT")
    if ProductFeatures.GetBooleanFeature("globals", "firewall_enable_ssh")
      SuSEFirewall.SetServicesForZones([@ssh_service], ["INT", "EXT"], true)
    end 

    # has non-dial-up and doesn't have dial-up interfaces
  elsif Ops.greater_than(Builtins.size(non_dup_interfaces), 0) &&
      Builtins.size(dial_up_interfaces) == 0
    SetInterfacesToZone(non_dup_interfaces, "EXT")
    if ProductFeatures.GetBooleanFeature("globals", "firewall_enable_ssh")
      SuSEFirewall.SetServicesForZones([@ssh_service], ["EXT"], true)
    end 

    # doesn't have non-dial-up and has dial-up interfaces
  elsif Builtins.size(non_dup_interfaces) == 0 &&
      Ops.greater_than(Builtins.size(dial_up_interfaces), 0)
    SetInterfacesToZone(dial_up_interfaces, "EXT")
    if ProductFeatures.GetBooleanFeature("globals", "firewall_enable_ssh")
      SuSEFirewall.SetServicesForZones([@ssh_service], ["EXT"], true)
    end
  end

  # Dial-up interfaces are considered to be internal,
  # Non-dial-up are considered to be external.
  # If there are only Non-dial-up interfaces, they are all considered as external.
  #
  # VNC Installation proposes to open VNC Access up on the Non-dial-up interfaces only.
  # SSH Installation is the same case...
  if Linuxrc.vnc
    Builtins.y2milestone(
      "This is an installation over VNC, opening VNC on all non-dial-up interfaces..."
    )
    # Try the service first, then ports
    # bnc #398855
    OpenServiceOnNonDialUpInterfaces(@vnc_service, @vnc_fallback_ports)
  end
  if Linuxrc.usessh
    Builtins.y2milestone(
      "This is an installation over SSH, opening SSH on all non-dial-up interfaces..."
    )
    # Try the service first, then ports
    # bnc #398855
    OpenServiceOnNonDialUpInterfaces(@ssh_service, ["ssh"])
  end

  # Firewall support for XEN domain0
  if IsXenInstalled()
    Builtins.y2milestone(
      "Adding Xen support into the firewall configuration"
    )
    SuSEFirewall.AddXenSupport
  end

  # BNC #766300 - Automatically propose opening iscsi-target port
  # when installing with withiscsi=1
  if Linuxrc.useiscsi
    Builtins.y2milestone(
      "iSCSI has been used during installation, opening %1 service",
      @iscsi_target_service
    )
    OpenServiceOnNonDialUpInterfaces(
      @iscsi_target_service,
      @iscsi_target_fallback_ports
    )
  end

  SetKnownInterfaces(SuSEFirewall.GetListOfKnownInterfaces)

  nil
end

- (void) Reset

This method returns an undefined value.

Function fills up default configuration into internal values



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# File '../../src/modules/SuSEFirewallProposal.rb', line 513

def Reset
  SuSEFirewall.ResetReadFlag
  SuSEFirewall.Read

  nil
end

- (Boolean) ServiceEnabled(service, zones)

Returns whether service is enabled in zones.

Parameters:

  • service (String)
  • zones (Array<String>)

Returns:

  • (Boolean)

    if enabled



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# File '../../src/modules/SuSEFirewallProposal.rb', line 200

def ServiceEnabled(service, zones)
  zones = deep_copy(zones)
  if service == nil || service == ""
    Builtins.y2error("Ups, service: %1?", service)
    return false
  end

  if zones == nil || zones == []
    Builtins.y2error("Ups, zones: %1?", zones)
    return false
  end

  serenabled = true

  serstat = SuSEFirewall.GetServices([service])
  Builtins.foreach(zones) do |one_zone|
    if Ops.get(serstat, [service, one_zone]) == false
      Builtins.y2milestone(
        "Service %1 is not enabled in %2",
        service,
        one_zone
      )
      serenabled = false
      raise Break
    end
  end

  serenabled
end

- (Object) SetChangedByUser(changed)

Function sets that proposal was changed by user

Parameters:

  • boolean

    if changed by user



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# File '../../src/modules/SuSEFirewallProposal.rb', line 480

def SetChangedByUser(changed)
  Builtins.y2milestone("Proposal was changed by user")
  @proposal_changed_by_user = changed

  nil
end

- (Object) SetInterfacesToZone(interfaces, zone)

Local function adds list of interfaces into zone.

Parameters:

  • list (string)

    of interfaces

  • zone (String)


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# File '../../src/modules/SuSEFirewallProposal.rb', line 137

def SetInterfacesToZone(interfaces, zone)
  interfaces = deep_copy(interfaces)
  Builtins.foreach(interfaces) do |interface|
    SuSEFirewall.AddInterfaceIntoZone(interface, zone)
  end

  nil
end

- (Object) SetKnownInterfaces(interfaces)

Local function sets currently known interfaces.

Parameters:

  • list (string)

    of known interfaces



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# File '../../src/modules/SuSEFirewallProposal.rb', line 101

def SetKnownInterfaces(interfaces)
  interfaces = deep_copy(interfaces)
  @known_interfaces = deep_copy(interfaces)

  nil
end

- (Object) SetProposalInitialized(initialized)

Function sets that proposal was initialized

Parameters:

  • boolean

    if initialized



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# File '../../src/modules/SuSEFirewallProposal.rb', line 497

def SetProposalInitialized(initialized)
  @proposal_initialized = initialized

  nil
end

- (Object) UpdateProposal

Local function for updating user-changed proposal.



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# File '../../src/modules/SuSEFirewallProposal.rb', line 147

def UpdateProposal
  last_known_interfaces = GetKnownInterfaces()
  currently_known_interfaces = SuSEFirewall.GetListOfKnownInterfaces

  had_dialup_interfaces = false
  Builtins.foreach(last_known_interfaces) do |this_interface|
    if IsDialUpInterface(this_interface)
      had_dialup_interfaces = true
      raise Break
    end
  end

  Builtins.foreach(currently_known_interfaces) do |interface|
    # already known but not assigned
    next if Builtins.contains(last_known_interfaces, interface)
    # already configured in some zone
    next if SuSEFirewall.GetZoneOfInterface(interface) != nil
    # any dial-up interfaces presented and the new one isn't dial-up
    if had_dialup_interfaces && !IsDialUpInterface(interface)
      AddWarning(
        Builtins.sformat(
          # TRANSLATORS: Warning in installation proposal, %1 is a device name (eth0, sl0, ...)
          _(
            "New network device '%1' found; added as an internal firewall interface"
          ),
          interface
        )
      )
      SetInterfacesToZone([interface], "INT")
    else
      AddWarning(
        Builtins.sformat(
          # TRANSLATORS: Warning in installation proposal, %1 is a device name (eth0, sl0, ...)
          _(
            "New network device '%1' found; added as an external firewall interface"
          ),
          interface
        )
      )
      SetInterfacesToZone([interface], "EXT")
    end
  end

  SetKnownInterfaces(currently_known_interfaces)

  nil
end