+host=$1
+
+type -t host &>/dev/null || apt-get -y install dnsutils
+gateway_if=$(ip route | sed -rn 's/^default via \S+ dev (\S+) .*/\1/p')
+if [[ ! $gateway_if ]]; then
+ echo "$0: failed to find gateway interface"
+ exit 1
+fi
+# assuming ipv4, or else we might need to deal with multiple addresses
+# in an ipv4 + ipv6 network.
+network=$(ip -4 -o a show dev $gateway_if | sed -rn '/scope.*global/s/^(\S+\s+){3}(\S+)\s.*/\2/p')
+if [[ ! $network ]]; then
+ echo "$0: failed to find network"
+ exit 1
+fi
+my_ip=${network%/*}
+if [[ $host == default ]]; then
+ ip=$network
+else
+ ip=$(host $host | sed -rn 's/^\S+ has address //p;T;q')/32
+fi
+
+
+# alternate way of getting my ip
+#gateway_ip=$(ip route | sed -rn 's/^default via (\S+) .*/\1/p')
+#my_ip=$(host faiserver $gateway_ip | sed -rn 's/^\S+ has address //p;T;q')
+
+if modprobe nfsd &>/dev/null; then
+ std_arg="-u nfs://faiserver/srv/fai/config"
+ root_arg="$my_ip:/srv/fai/nfsroot"
+ # fai-setup without -e sets the ip to the local_ip/local_network, eg 192.168.1.3/24
+ # I restrict it to one ip as simple but imperfect access control.
+ sed -ri --follow-symlinks '\%^/srv/fai/%d' /etc/exports
+ cat >>/etc/exports <<EOF
+/srv/fai/config $ip(async,ro,no_subtree_check)
+/srv/fai/nfsroot $ip(async,ro,no_subtree_check,no_root_squash)
+EOF
+ exportfs -ra
+else
+ std_arg="-u http://faiserver:8080/config.tar.gz"
+ root_arg="live:http://faiserver:8080/squash.img"
+ /a/exe/web-conf -i -p 8080 - apache2 faiserver <<EOF
+<Location />
+ Deny from all
+ Allow from $ip
+</Location>
+EOF
+fi