diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6335b09f..dabf8b57 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -127,8 +127,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Update iPXE building script
 - Send Info, Recv, Send, and Out messages to stdout; and others to stderr
 
-- default is now protected and can't be deleted
 - first container imported container is added to the default profile
+- grub in combination can now be set as boot method with `warewulf.grubboot: true` in 
+  `warewulf.conf`. For unknown nodes `grub.efi` and `shim.efi` will be extracted from
+  the host running warewulf. If node has container it will get these binaries from the
+  container image.
+
 ## [4.4.0] 2023-01-18
 
 ### Added
diff --git a/Makefile b/Makefile
index d6ef7fec..e85ac05b 100644
--- a/Makefile
+++ b/Makefile
@@ -94,6 +94,7 @@ install: build docs
 	install -d -m 0755 $(DESTDIR)$(WWCHROOTDIR)
 	install -d -m 0755 $(DESTDIR)$(WWPROVISIONDIR)
 	install -d -m 0755 $(DESTDIR)$(WWOVERLAYDIR)/wwinit/$(WWCLIENTDIR)
+	install -d -m 0755 $(DESTDIR)$(WWOVERLAYDIR)/host/$(TFTPDIR)/warewulf/
 	install -d -m 0755 $(DESTDIR)$(WWCONFIGDIR)/examples
 	install -d -m 0755 $(DESTDIR)$(WWCONFIGDIR)/ipxe
 	install -d -m 0755 $(DESTDIR)$(WWCONFIGDIR)/grub
@@ -113,7 +114,8 @@ install: build docs
 	test -f $(DESTDIR)$(DATADIR)/warewulf/defaults.conf || install -m 0644 etc/defaults.conf $(DESTDIR)$(DATADIR)/warewulf/defaults.conf
 	for f in etc/examples/*.ww; do install -m 0644 $$f $(DESTDIR)$(WWCONFIGDIR)/examples/; done
 	for f in etc/ipxe/*.ipxe; do install -m 0644 $$f $(DESTDIR)$(WWCONFIGDIR)/ipxe/; done
-	for f in etc/grub/*; do install -m 0644 $$f $(DESTDIR)$(WWCONFIGDIR)/grub/; done
+	install -m 0644 etc/grub/grub.cfg.ww $(DESTDIR)$(WWCONFIGDIR)/grub/grub.cfg.ww
+	install -m 0644 etc/grub/chainload.ww $(DESTDIR)$(WWOVERLAYDIR)/host$(TFTPDIR)/warewulf/grub.cfg.ww
 	(cd overlays && find * -type f -exec install -D -m 0644 {} $(DESTDIR)$(WWOVERLAYDIR)/{} \;)
 	(cd overlays && find * -type d -exec mkdir -pv $(DESTDIR)$(WWOVERLAYDIR)/{} \;)
 	(cd overlays && find * -type l -exec cp -av {} $(DESTDIR)$(WWOVERLAYDIR)/{} \;)
diff --git a/etc/grub/chainload.ww b/etc/grub/chainload.ww
new file mode 100644
index 00000000..dc3c51d8
--- /dev/null
+++ b/etc/grub/chainload.ww
@@ -0,0 +1,28 @@
+# This file is autogenerated by warewulf
+# Host:   {{ .BuildHost }}
+# Time:   {{ .BuildTime }}
+# Source: {{ .BuildSource }}
+echo "================================================================================"
+echo "Warewulf v4 now iXPE booting with grub"
+echo "================================================================================"
+set timeout=2
+# Must chainload in order to get kernel args for specific node
+menuentry "Load specific configfile" {
+    conf="(http,{{.Ipaddr}}:{{.Warewulf.Port}})/efiboot/grub.cfg"
+    configfile $conf
+}
+menuentry "Chainload shim of container" {
+    shim="(http,{{.Ipaddr}}:{{.Warewulf.Port}})/efiboot/shim.efi"
+    chainloader ${shim}
+}
+menuentry "UEFI Firmware Settings" --id "uefi-firmware" {
+    fwsetup
+}
+menuentry "System restart" {
+    echo "System rebooting..."
+    reboot
+}
+menuentry "System shutdown" {
+    echo "System shutting down..."
+    halt
+}
diff --git a/etc/grub/grub.cfg.ww b/etc/grub/grub.cfg.ww
index add45e64..7efbbe0a 100644
--- a/etc/grub/grub.cfg.ww
+++ b/etc/grub/grub.cfg.ww
@@ -1,25 +1,51 @@
 echo "================================================================================"
-echo "Warewulf v4 now booting with grub"
+echo "Warewulf v4 now http booting grub: {{.Fqdn}} ({{.Hwaddr}})"
+echo "================================================================================"
 echo
-uri="(http,{{.Ipaddr}}:9873)/provision/${net_default_mac}?assetkey="
+echo "Warewulf Controller: {{.Ipaddr}}"
+echo 
+sleep 1
+smbios --type1 --get-string 8 --set assetkey
+uri="(http,{{.Ipaddr}}:{{.Port}})/provision/${net_default_mac}?assetkey=${assetkey}"
 kernel="${uri}&stage=kernel"
 container="${uri}&stage=container&compress=gz"
 system="${uri}&stage=system&compress=gz"
-echo "Warewulf Controller: {{.Ipaddr}}"
-echo "Trying to load a kernel... "
-linux $kernel wwid="${net_default_mac}" "{{.KernelArgs}}"
-if [ x$? = x0 ] ; then
-echo "Loading initrd..."
-initrd $container $system
-echo "Booting..."
-boot
-else
-echo "MESSAGE: This node is unconfigured. Please have your system administrator add a"
-echo "         configuration for this node with HW address: ${net_default_mac}"
-echo ""
-echo "Rebooting in 1 minute..."
-sleep 60
-reboot
-fi
-
-
+runtime="${uri}&stage=runtime&compress=gz"
+set default=ww4
+set timeout=5
+menuentry "Network boot node: {{.Id}}" --id ww4 {
+    {{if .KernelOverride }}
+    echo "Kernel:                {{.KernelOverride}}"
+    {{else}}
+    echo "Kernel:                {{.ContainerName}} (container default)"
+    {{end}}
+    echo "KernelArgs:            {{.KernelArgs}}"
+    linux $kernel wwid=${net_default_mac} {{.KernelArgs}}
+    if [ x$? = x0 ] ; then
+        echo "Loading Container:     {{.ContainerName}}"
+        initrd $container $system $runtime
+        boot
+    else    
+        echo "MESSAGE: This node seems to be unconfigured. Please have your system administrator add a"
+        echo "         configuration for this node with HW address: ${net_default_mac}"
+        echo ""
+        echo "Rebooting in 1 minute..."
+        sleep 60
+        reboot
+    fi
+}
+menuentry "Chainload specific configfile" {
+    conf="(http,{{.Ipaddr}}:{{.Port}})/efiboot/grub.cfg"
+    configfile $conf
+}
+menuentry "UEFI Firmware Settings" --id "uefi-firmware" {
+    fwsetup
+}
+menuentry "System restart" {
+    echo "System rebooting..."
+    reboot
+}
+menuentry "System shutdown" {
+    echo "System shutting down..."
+    halt
+}
\ No newline at end of file
diff --git a/go.mod b/go.mod
index c9e07d29..4d304414 100644
--- a/go.mod
+++ b/go.mod
@@ -11,6 +11,7 @@ require (
 	github.com/creasty/defaults v1.7.0
 	github.com/fatih/color v1.15.0
 	github.com/golang/glog v1.0.0
+	github.com/golang/protobuf v1.5.2
 	github.com/google/uuid v1.3.0
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.15.2
 	github.com/manifoldco/promptui v0.9.0
@@ -56,7 +57,6 @@ require (
 	github.com/docker/go-units v0.4.0 // indirect
 	github.com/ghodss/yaml v1.0.0 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
-	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/golang/snappy v0.0.3 // indirect
 	github.com/gorilla/mux v1.7.4 // indirect
 	github.com/inconshreveable/mousetrap v1.0.1 // indirect
diff --git a/internal/app/wwctl/container/delete/main.go b/internal/app/wwctl/container/delete/main.go
index b30b9c69..71e5a3d7 100644
--- a/internal/app/wwctl/container/delete/main.go
+++ b/internal/app/wwctl/container/delete/main.go
@@ -2,15 +2,11 @@ package delete
 
 import (
 	"fmt"
-	"os"
 
 	"github.com/hpcng/warewulf/internal/pkg/api/container"
 	"github.com/hpcng/warewulf/internal/pkg/api/routes/wwapiv1"
 	apiutil "github.com/hpcng/warewulf/internal/pkg/api/util"
-	"github.com/hpcng/warewulf/internal/pkg/util"
 
-	"github.com/hpcng/warewulf/internal/pkg/node"
-	"github.com/hpcng/warewulf/internal/pkg/wwlog"
 	"github.com/spf13/cobra"
 )
 
@@ -18,21 +14,7 @@ func CobraRunE(cmd *cobra.Command, args []string) (err error) {
 	cdp := &wwapiv1.ContainerDeleteParameter{
 		ContainerNames: args,
 	}
-	nodeDB, err := node.New()
-	if err != nil {
-		wwlog.Error("Failed to open node database: %s", err)
-		os.Exit(1)
-	}
 
-	profiles, err := nodeDB.MapAllProfiles()
-	if err != nil {
-		wwlog.Error("Could not load all profiles: %s", err)
-		os.Exit(1)
-	}
-
-	if util.InSlice(args, profiles["default"].ContainerName.Get()) {
-		return fmt.Errorf("can't delete container which is in the default profile")
-	}
 	if !SetYes {
 		yes := apiutil.ConfirmationPrompt(fmt.Sprintf("Are you sure you want to delete container %s", args))
 		if !yes {
diff --git a/internal/app/wwctl/container/exec/main.go b/internal/app/wwctl/container/exec/main.go
index f5ecd31c..f34ada9f 100644
--- a/internal/app/wwctl/container/exec/main.go
+++ b/internal/app/wwctl/container/exec/main.go
@@ -12,9 +12,7 @@ import (
 	"time"
 
 	"github.com/hpcng/warewulf/internal/pkg/container"
-	"github.com/hpcng/warewulf/internal/pkg/node"
 	"github.com/hpcng/warewulf/internal/pkg/util"
-	"github.com/hpcng/warewulf/internal/pkg/warewulfd"
 	"github.com/hpcng/warewulf/internal/pkg/wwlog"
 	"github.com/spf13/cobra"
 )
@@ -135,16 +133,6 @@ func CobraRunE(cmd *cobra.Command, args []string) error {
 		wwlog.Error("Could not build container %s: %s", containerName, err)
 		os.Exit(1)
 	}
-	nodeDB, err := node.New()
-	if err != nil {
-		wwlog.Warn("couldn't open node database, so can't update shim/grub if this container is used in default profile: %s", err)
-	} else {
-		profileMap, _ := nodeDB.MapAllProfiles()
-		if _, ok := profileMap["default"]; ok && profileMap["default"].ContainerName.Get() == containerName {
-			return warewulfd.CopyShimGrub()
-		}
-	}
-
 	return nil
 }
 func SetBinds(myBinds []string) {
diff --git a/internal/pkg/api/container/container.go b/internal/pkg/api/container/container.go
index 54497288..1942aed8 100644
--- a/internal/pkg/api/container/container.go
+++ b/internal/pkg/api/container/container.go
@@ -271,10 +271,6 @@ func ContainerImport(cip *wwapiv1.ContainerImportParameter) (containerName strin
 					err = errors.Wrap(err, "failed to update profile")
 					return
 				}
-				err = warewulfd.CopyShimGrub()
-				if err != nil {
-					wwlog.Warn("couldn't copy shim/grub of default container: %s", err)
-				}
 			}
 		}
 		// TODO: We need this in a function with a flock around it.
diff --git a/internal/pkg/api/profile/profile.go b/internal/pkg/api/profile/profile.go
index 731d546c..349c57a7 100644
--- a/internal/pkg/api/profile/profile.go
+++ b/internal/pkg/api/profile/profile.go
@@ -8,7 +8,6 @@ import (
 	"github.com/hpcng/warewulf/internal/pkg/api/routes/wwapiv1"
 	"github.com/hpcng/warewulf/internal/pkg/node"
 	"github.com/hpcng/warewulf/internal/pkg/util"
-	"github.com/hpcng/warewulf/internal/pkg/warewulfd"
 	"github.com/hpcng/warewulf/internal/pkg/wwlog"
 	"github.com/pkg/errors"
 	"gopkg.in/yaml.v2"
@@ -33,12 +32,6 @@ func ProfileSet(set *wwapiv1.ProfileSetParameter) (err error) {
 		return
 	}
 	dbError := apinode.DbSave(&nodeDB)
-	if util.InSlice(set.ProfileNames, "default") {
-		err = warewulfd.CopyShimGrub()
-		if err != nil {
-			wwlog.Warn("shim/grub couldn't be copied: %s", err)
-		}
-	}
 	return dbError
 }
 
diff --git a/internal/pkg/config/warewulf.go b/internal/pkg/config/warewulf.go
index e8f08ac5..9a0dc3f4 100644
--- a/internal/pkg/config/warewulf.go
+++ b/internal/pkg/config/warewulf.go
@@ -10,4 +10,5 @@ type WarewulfConf struct {
 	EnableHostOverlay bool   `yaml:"host overlay" default:"true"`
 	Syslog            bool   `yaml:"syslog" default:"false"`
 	DataStore         string `yaml:"datastore" default:"/var/lib/warewulf"`
+	GrubBoot          bool   `yaml:"grubboot" default:"false"`
 }
diff --git a/internal/pkg/configure/tftp.go b/internal/pkg/configure/tftp.go
index 82e023f3..058ca059 100644
--- a/internal/pkg/configure/tftp.go
+++ b/internal/pkg/configure/tftp.go
@@ -1,12 +1,12 @@
 package configure
 
 import (
-	"fmt"
 	"os"
 	"path"
 
 	warewulfconf "github.com/hpcng/warewulf/internal/pkg/config"
 	"github.com/hpcng/warewulf/internal/pkg/util"
+	"github.com/hpcng/warewulf/internal/pkg/warewulfd"
 	"github.com/hpcng/warewulf/internal/pkg/wwlog"
 )
 
@@ -20,28 +20,34 @@ func TFTP() error {
 		return err
 	}
 
-	fmt.Printf("Writing PXE files to: %s\n", tftpdir)
-	copyCheck := make(map[string]bool)
-	for _, f := range controller.TFTP.IpxeBinaries {
-		if !path.IsAbs(f) {
-			f = path.Join(controller.Paths.Ipxesource, f)
-		}
-		if copyCheck[f] {
-			continue
-		}
-		copyCheck[f] = true
-		err = util.SafeCopyFile(f, path.Join(tftpdir, path.Base(f)))
+	if controller.Warewulf.GrubBoot {
+		err := warewulfd.CopyShimGrub()
 		if err != nil {
-			wwlog.Warn("ipxe binary could not be copied, booting may not work: %s", err)
+			wwlog.Warn("error when copying shim/grub binaries: %s", err)
+		}
+	} else {
+		wwlog.Info("Writing PXE files to: %s", tftpdir)
+		copyCheck := make(map[string]bool)
+		for _, f := range controller.TFTP.IpxeBinaries {
+			if !path.IsAbs(f) {
+				f = path.Join(controller.Paths.Ipxesource, f)
+			}
+			if copyCheck[f] {
+				continue
+			}
+			copyCheck[f] = true
+			err = util.SafeCopyFile(f, path.Join(tftpdir, path.Base(f)))
+			if err != nil {
+				wwlog.Warn("ipxe binary could not be copied, booting may not work: %s", err)
+			}
 		}
 	}
-
 	if !controller.TFTP.Enabled {
 		wwlog.Info("Warewulf does not auto start TFTP services due to disable by warewulf.conf")
 		os.Exit(0)
 	}
 
-	fmt.Printf("Enabling and restarting the TFTP services\n")
+	wwlog.Info("Enabling and restarting the TFTP services")
 	err = util.SystemdStart(controller.TFTP.SystemdName)
 	if err != nil {
 		wwlog.Error("%s", err)
diff --git a/internal/pkg/container/grub.go b/internal/pkg/container/grub.go
index 443ae995..ac934581 100644
--- a/internal/pkg/container/grub.go
+++ b/internal/pkg/container/grub.go
@@ -35,11 +35,15 @@ func GrubFind(container string) string {
 	if container_path == "" {
 		return ""
 	}
+	return GrubFindPath(container_path)
+}
+
+func GrubFindPath(grub_path string) string {
 	for _, grubdir := range grubDirs() {
 		wwlog.Debug("Checking grub directory: %s", grubdir)
 		for _, grubname := range grubNames() {
 			wwlog.Debug("Checking for grub name: %s", grubname)
-			grubPaths, _ := filepath.Glob(path.Join(container_path, grubdir, grubname))
+			grubPaths, _ := filepath.Glob(path.Join(grub_path, grubdir, grubname))
 			for _, grubpath := range grubPaths {
 				wwlog.Debug("Checking for grub path: %s", grubpath)
 				// Only succeeds if grubpath exists and, if a
diff --git a/internal/pkg/container/shim.go b/internal/pkg/container/shim.go
index 6d1efe5e..8d14f2ac 100644
--- a/internal/pkg/container/shim.go
+++ b/internal/pkg/container/shim.go
@@ -25,7 +25,7 @@ func shimNames() []string {
 }
 
 /*
-find the path of the shim binary
+find the path of the shim binary in container
 */
 func ShimFind(container string) string {
 	container_path := RootFsDir(container)
@@ -33,11 +33,18 @@ func ShimFind(container string) string {
 	if container_path == "" {
 		return ""
 	}
+	return ShimFindPath(container_path)
+}
+
+/*
+find the path of the shim binary in container
+*/
+func ShimFindPath(shimpath string) string {
 	for _, shimdir := range shimDirs() {
 		wwlog.Debug("Checking shim directory: %s", shimdir)
 		for _, shimname := range shimNames() {
 			wwlog.Debug("Checking for shim name: %s", shimname)
-			shimPaths, _ := filepath.Glob(path.Join(container_path, shimdir, shimname))
+			shimPaths, _ := filepath.Glob(path.Join(shimpath, shimdir, shimname))
 			for _, shimPath := range shimPaths {
 				wwlog.Debug("Checking for shim path: %s", shimPath)
 				// Only succeeds if shimPath exists and, if a
diff --git a/internal/pkg/node/datastructure.go b/internal/pkg/node/datastructure.go
index 0965570b..34432454 100644
--- a/internal/pkg/node/datastructure.go
+++ b/internal/pkg/node/datastructure.go
@@ -52,7 +52,6 @@ type NodeConf struct {
 	PrimaryNetDev  string                 `yaml:"primary network,omitempty" lopt:"primarynet" sopt:"p" comment:"Set the primary network interface"`
 	Disks          map[string]*Disk       `yaml:"disks,omitempty"`
 	FileSystems    map[string]*FileSystem `yaml:"filesystems,omitempty"`
-	BootMethod     string                 `yaml:"boot method,omitempty" lopt:"bootmethod" comment:" boot method, can be grub or ipxe"`
 }
 
 type IpmiConf struct {
@@ -166,7 +165,6 @@ type NodeInfo struct {
 	Ipmi           *IpmiEntry
 	Profiles       Entry
 	PrimaryNetDev  Entry
-	BootMethod     Entry
 	NetDevs        map[string]*NetDevEntry
 	Tags           map[string]*Entry
 	Disks          map[string]*DiskEntry
diff --git a/internal/pkg/warewulfd/copyshim.go b/internal/pkg/warewulfd/copyshim.go
index ac021e13..002ed336 100644
--- a/internal/pkg/warewulfd/copyshim.go
+++ b/internal/pkg/warewulfd/copyshim.go
@@ -9,49 +9,29 @@ import (
 	"github.com/hpcng/warewulf/internal/pkg/wwlog"
 
 	"github.com/hpcng/warewulf/internal/pkg/container"
-	"github.com/hpcng/warewulf/internal/pkg/node"
 	"github.com/hpcng/warewulf/internal/pkg/util"
 )
 
 /*
-Copies the default shim, which is the shim located in the default container
+Copies the default shim, which is the shim located on host
 to the tftp directory
 */
 
 func CopyShimGrub() (err error) {
-	wwlog.Debug("copy shim and grub binaries")
-	nodeDB, err := node.New()
-	if err != nil {
-		return err
-	}
 	conf := warewulfconf.Get()
-	if err != nil {
-		return err
-	}
-	profiles, err := nodeDB.MapAllProfiles()
-	if err != nil {
-		return err
-	}
-	if _, ok := profiles["default"]; !ok {
-		return fmt.Errorf("default profile doesn't exist")
-	}
-	// *Entry.Get doesn't work the same as it works for nodes!
-	if profiles["default"].BootMethod.Get() == "ipxe" || profiles["default"].BootMethod.Get() == "" {
-		wwlog.Verbose("default profile uses ipxe boot")
-		return
-	}
-	shimPath := container.ShimFind(profiles["default"].ContainerName.Get())
+	wwlog.Debug("copy shim and grub binaries from host")
+	shimPath := container.ShimFindPath("/")
 	if shimPath == "" {
-		return fmt.Errorf("no shim found in the container: %s", profiles["default"].ContainerName.Get())
+		return fmt.Errorf("no shim found on the host os")
 	}
 	err = util.CopyFile(shimPath, path.Join(conf.Paths.Tftpdir, "warewulf", "shim.efi"))
 	if err != nil {
 		return err
 	}
 	_ = os.Chmod(path.Join(conf.Paths.Tftpdir, "warewulf", "shim.efi"), 0o755)
-	grubPath := container.GrubFind(profiles["default"].ContainerName.Get())
+	grubPath := container.GrubFindPath("/")
 	if grubPath == "" {
-		return fmt.Errorf("no grub found in the container: %s", profiles["default"].ContainerName.Get())
+		return fmt.Errorf("no grub found on host os")
 	}
 	err = util.CopyFile(grubPath, path.Join(conf.Paths.Tftpdir, "warewulf", "grub.efi"))
 	if err != nil {
diff --git a/internal/pkg/warewulfd/warewulfd.go b/internal/pkg/warewulfd/warewulfd.go
index aab8cd80..0848f4da 100644
--- a/internal/pkg/warewulfd/warewulfd.go
+++ b/internal/pkg/warewulfd/warewulfd.go
@@ -65,7 +65,6 @@ func RunServer() error {
 		wwlog.Error("Could not prepopulate node status DB: %s", err)
 	}
 
-	err = CopyShimGrub()
 	if err != nil {
 		wwlog.Warn("couldn't copy default shim: %s", err)
 	}
diff --git a/overlays/host/etc/dhcp/dhcpd.conf.ww b/overlays/host/etc/dhcp/dhcpd.conf.ww
index b7b35e3f..1054d401 100644
--- a/overlays/host/etc/dhcp/dhcpd.conf.ww
+++ b/overlays/host/etc/dhcp/dhcpd.conf.ww
@@ -24,12 +24,12 @@ option PXE.mtftp-delay code 5 = unsigned integer 8;
 
 option architecture-type   code 93  = unsigned integer 16;
 
-{{- if eq $.ProfileMap.default.BootMethod.Get "grub" }}
+{{- if $.Warewulf.GrubBoot }}
 if substring (option vendor-class-identifier, 0, 9) = "PXEClient" {
   next-server {{ $.Ipaddr }};
   filename "warewulf/shim.efi";
 } elsif substring (option vendor-class-identifier, 0, 10) = "HTTPClient" {
-  filename "http://{{$.Ipaddr}}:{{$.Warewulf.Port}}/grub/shim.efi";
+  filename "http://{{$.Ipaddr}}:{{$.Warewulf.Port}}/efiboot/shim.efi";
 }
 {{- else }}
 if exists user-class and option user-class = "iPXE" {
diff --git a/userdocs/contents/grub.rst b/userdocs/contents/grub.rst
index 80b3d463..7bd3e0db 100644
--- a/userdocs/contents/grub.rst
+++ b/userdocs/contents/grub.rst
@@ -7,13 +7,9 @@ can be used with the advantage that secure boot can be used. That means
 that only the signed kernel of a distribution can be booted. This can
 be a huge security benefit for some scenarios.
 
-In order to enable the grub bootm the field `boot method` has
-to be set to `grub` at least for the `default` profile in `nodes.conf`. 
-This can also be done with the command
-
-.. code-block:: console
-
-  # wwctl profile set default --bootmethod grub
+In order to enable the grub boot method it has to ne enabled in `warewulf.conf`.
+Nodes which are not known to warewulf will then booted with the shim/grub from
+the host on which warewulf is installed.
 
 
 Boot process
@@ -43,8 +39,8 @@ of one Distribution, which means that every Distribution needs a separate
 the containers.
 
 For the case when the node is unknown to warewulf or
-can't be identified during the `tFTP`` boot phase, the binaries are 
-extracted from the container defined in the `default` profile.
+can't be identified during the `tFTP`` boot phase, the shim/grub binaries of
+the host in which warewulf is running will be used.
 
 PXE/tFTP boot
 -------------
@@ -68,8 +64,8 @@ The standard network boot process with `grub` and `iPXE` has following steps
       bios->shim [lhead=cluster1,label="filename=shim.efi"];
       subgraph cluster1{
         label="Grub boot"
-        shim[shape=record label="{shim.efi|extracted from container of default profile}"];
-        grub[shape=record label="{grubx64.efi | name hardcoded in shim.efi|extracted from container of default profile}"]
+        shim[shape=record label="{shim.efi|from ww4 host}"];
+        grub[shape=record label="{grubx64.efi | name hardcoded in shim.efi|from ww4 host}"]
         shim->grub[label="tFTP"];
         grubcfg[shape=record label="{grub.cfg|static under tFTP root}"];
         grub->grubcfg[label="tFTP"];
@@ -80,7 +76,7 @@ The standard network boot process with `grub` and `iPXE` has following steps
   }
 
 As the tFTP server is independent of warewulf, the `shim` and `grub` EFI binaries
-for the tFTP server are copied from the container defined in the `default` profile.
+for the tFTP server are copied from the host on which warewulf is running.
 This means that for secure boot the distributor e.g. SUSE of the container in
 the `default` profile must match the distributor of the container which then
 also must be signed by the SUSE key.