diff --git a/gestion/gen_confs/pxeboot/config b/gestion/gen_confs/pxeboot/config
index be3ad2f5..fba40258 100644
--- a/gestion/gen_confs/pxeboot/config
+++ b/gestion/gen_confs/pxeboot/config
@@ -12,10 +12,9 @@ SKELETON="$TFTPROOT-base"
 TMPDIR="/var/tmp/build-netboot"
 ISODIR="/var/lib/tftpboot-g"
 WGETOPT="-4"
-[[ $1 == "" ]] && echo "Il faut spécifier l'IP" && exit 1
+[[ $1 == "" ]] && echo "Il faut spécifier l'IP du serveur en paramètre" && exit 1
 OWN_IP="$1"
 /etc/init.d/nfs-kernel-server stop
-umount /var/lib/tftpboot/livecd/ubuntu/* || true;
 
 # Définitions spécifiques au Sys Rescue CD
 SYSRCCD_ARCHS=""
@@ -37,8 +36,10 @@ UBUNTU_ARCHS="i386 amd64"
 UBUNTU_FTP="ftp://ftp.crans.org/ubuntu/dists"
 
 UBUNTU_LIVE="12.04 12.10 13.04 13.10"
-# il faut modifier le nfs et mettre les images dans $ISODIR/ubuntu/
-# puis les monter et partager dans $TFTPROOT/livecd/ubuntu/$dist-$arch
+# il faut modifier le nfs (ajouter la sortie de export_ubuntu_live
+# à /etc/exports) et mettre les images dans $ISODIR/ubuntu/ puis
+# les monter dans $TFTPROOT/livecd/ubuntu/$dist-$arch avec
+# mount_ubuntu_live
 UBUNTU_LIVE_TYPE="ubuntu xubuntu kubuntu"
 UBUNTU_LIVE_ARCHS="i386 amd64"
 
@@ -57,6 +58,7 @@ FEDORA_DISTS="18 19"
 FEDORA_ARCHS="i386 x86_64"
 FEDORA_FTP="ftp://ftp.free.fr/mirrors/fedora.redhat.com/fedora/linux/"
 
+# Définitions spécifiques à OpenSuse
 OPENSUSE_DISTS="11.4 12.1 12.2 13.1"
 OPENSUSE_ARCHS="i386 x86_64"
 OPENSUSE_FTP="ftp://ftp.free.fr/mirrors/ftp.opensuse.org/opensuse/distribution/"
diff --git a/gestion/gen_confs/pxeboot/export_ubuntu_live b/gestion/gen_confs/pxeboot/export_ubuntu_live
new file mode 100755
index 00000000..74aec833
--- /dev/null
+++ b/gestion/gen_confs/pxeboot/export_ubuntu_live
@@ -0,0 +1,16 @@
+#!/bin/bash
+. /usr/scripts/gestion/gen_confs/pxeboot/config
+# /var/lib/tftpboot/livecd/ubuntu/ubuntu-12.04-i386 138.231.136.0/21(async,no_subtree_check,no_root_squash,ro)
+for type in $UBUNTU_LIVE_TYPE; do
+    echo "########## Netboot $type ##########"
+    for dist in $UBUNTU_LIVE; do
+        for arch in $UBUNTU_LIVE_ARCHS; do
+            if test -e $ISODIR/ubuntu/$type-$dist-desktop-$arch.iso; then
+    	        echo "$TFTPROOT/livecd/ubuntu/$type-$dist-$arch 138.231.136.0/21(async,no_subtree_check,no_root_squash,ro)"
+            fi
+    	done
+    done
+    echo
+done
+
+/etc/init.d/nfs-kernel-server start
diff --git a/gestion/gen_confs/pxeboot/mount_ubuntu_live b/gestion/gen_confs/pxeboot/mount_ubuntu_live
index 20666fa3..971e52fb 100755
--- a/gestion/gen_confs/pxeboot/mount_ubuntu_live
+++ b/gestion/gen_confs/pxeboot/mount_ubuntu_live
@@ -1,12 +1,12 @@
 #!/bin/bash
 . /usr/scripts/gestion/gen_confs/pxeboot/config
-
+umount $TFTPROOT/livecd/ubuntu/* || true;
 for type in $UBUNTU_LIVE_TYPE; do
     for dist in $UBUNTU_LIVE; do
         for arch in $UBUNTU_LIVE_ARCHS; do
             if test -e $ISODIR/ubuntu/$type-$dist-desktop-$arch.iso; then
     	        mkdir -p $TFTPROOT/livecd/ubuntu/$type-$dist-$arch
-    	        mount -o loop $ISODIR/ubuntu/$type-$dist-desktop-$arch.iso $TFTPROOT/livecd/ubuntu/$type-$dist-$arch
+    	        mount -o loop,ro $ISODIR/ubuntu/$type-$dist-desktop-$arch.iso $TFTPROOT/livecd/ubuntu/$type-$dist-$arch
             fi
     	done
     done
diff --git a/gestion/gen_confs/pxeboot/pxeboot b/gestion/gen_confs/pxeboot/pxeboot
index e4a02c50..70d52ef5 100755
--- a/gestion/gen_confs/pxeboot/pxeboot
+++ b/gestion/gen_confs/pxeboot/pxeboot
@@ -310,6 +310,7 @@ for dist in $UBUNTU_DISTS; do
     done
 done
 
+umount $TFTPROOT/livecd/ubuntu/* || true;
 for type in $UBUNTU_LIVE_TYPE; do
     for dist in $UBUNTU_LIVE; do
         for arch in $UBUNTU_LIVE_ARCHS; do