diff --git a/exercises/euca.sh b/exercises/euca.sh
index f999609..67150e4 100755
--- a/exercises/euca.sh
+++ b/exercises/euca.sh
@@ -12,7 +12,6 @@
 # an error.  It is also useful for following allowing as the install occurs.
 set -o xtrace
 
-
 # Settings
 # ========
 
@@ -21,16 +20,52 @@
 source ./openrc
 popd
 
-# find a machine image to boot
+# Find a machine image to boot
 IMAGE=`euca-describe-images | grep machine | cut -f2 | head -n1`
 
-# launch it
-INSTANCE=`euca-run-instances $IMAGE | grep INSTANCE | cut -f2`
+# Define secgroup
+SECGROUP=euca_secgroup
 
-# assure it has booted within a reasonable time
+# Add a secgroup
+euca-add-group -d description $SECGROUP
+
+# Launch it
+INSTANCE=`euca-run-instances -g $SECGROUP -t m1.tiny $IMAGE | grep INSTANCE | cut -f2`
+
+# Assure it has booted within a reasonable time
 if ! timeout $RUNNING_TIMEOUT sh -c "while euca-describe-instances $INSTANCE | grep -q running; do sleep 1; done"; then
     echo "server didn't become active within $RUNNING_TIMEOUT seconds"
     exit 1
 fi
 
+# Allocate floating address
+FLOATING_IP=`euca-allocate-address | cut -f2`
+
+# Release floating address
+euca-associate-address -i $INSTANCE $FLOATING_IP
+
+
+# Authorize pinging
+euca-authorize -P icmp -s 0.0.0.0/0 -t -1:-1 $SECGROUP
+
+# Max time till the vm is bootable
+BOOT_TIMEOUT=${BOOT_TIMEOUT:-15}
+if ! timeout $BOOT_TIMEOUT sh -c "while ! ping -c1 -w1 $FLOATING_IP; do sleep 1; done"; then
+    echo "Couldn't ping server"
+    exit 1
+fi
+
+# Revoke pinging
+euca-revoke -P icmp -s 0.0.0.0/0 -t -1:-1 $SECGROUP
+
+# Delete group
+euca-delete-group $SECGROUP
+
+# Release floating address
+euca-disassociate-address $FLOATING_IP
+
+# Release floating address
+euca-release-address $FLOATING_IP
+
+# Terminate instance
 euca-terminate-instances $INSTANCE
diff --git a/stack.sh b/stack.sh
index 838b516..5c97814 100755
--- a/stack.sh
+++ b/stack.sh
@@ -82,6 +82,7 @@
 
 # apt-get wrapper to just get arguments set correctly
 function apt_get() {
+    [[ "$OFFLINE" = "True" ]] && return
     local sudo="sudo"
     [ "$(id -u)" = "0" ] && sudo="env"
     $sudo DEBIAN_FRONTEND=noninteractive apt-get \
@@ -147,6 +148,23 @@
     sudo mv $TEMPFILE /etc/sudoers.d/stack_sh_nova
 fi
 
+# Normalize config values to True or False
+# VAR=`trueorfalse default-value test-value`
+function trueorfalse() {
+    local default=$1
+    local testval=$2
+
+    [[ -z "$testval" ]] && { echo "$default"; return; }
+    [[ "0 no false False FALSE" =~ "$testval" ]] && { echo "False"; return; }
+    [[ "1 yes true True TRUE" =~ "$testval" ]] && { echo "True"; return; }
+    echo "$default"
+}
+
+# Set True to configure stack.sh to run cleanly without Internet access.
+# stack.sh must have been previously run with Internet access to install
+# prerequisites and initialize $DEST.
+OFFLINE=`trueorfalse False $OFFLINE`
+
 # Set the destination directories for openstack projects
 NOVA_DIR=$DEST/nova
 HORIZON_DIR=$DEST/horizon
@@ -196,18 +214,6 @@
     fi
 fi
 
-# Normalize config values to True or False
-# VAR=`trueorfalse default-value test-value`
-function trueorfalse() {
-    local default=$1
-    local testval=$2
-
-    [[ -z "$testval" ]] && { echo "$default"; return; }
-    [[ "0 no false False FALSE" =~ "$testval" ]] && { echo "False"; return; }
-    [[ "1 yes true True TRUE" =~ "$testval" ]] && { echo "True"; return; }
-    echo "$default"
-}
-
 # Configure services to syslog instead of writing to individual log files
 SYSLOG=`trueorfalse False $SYSLOG`
 SYSLOG_HOST=${SYSLOG_HOST:-$HOST_IP}
@@ -460,17 +466,23 @@
     done
 }
 
+function pip_install {
+    [[ "$OFFLINE" = "True" ]] && return
+    sudo PIP_DOWNLOAD_CACHE=/var/cache/pip pip install --use-mirrors $@
+}
+
 # install apt requirements
 apt_get update
 apt_get install $(get_packages)
 
 # install python requirements
-sudo PIP_DOWNLOAD_CACHE=/var/cache/pip pip install --use-mirrors `cat $FILES/pips/*`
+pip_install `cat $FILES/pips/* | uniq`
 
 # git clone only if directory doesn't exist already.  Since ``DEST`` might not
 # be owned by the installation user, we create the directory and change the
 # ownership to the proper user.
 function git_clone {
+    [[ "$OFFLINE" = "True" ]] && return
 
     GIT_REMOTE=$1
     GIT_DEST=$2