Script pour enfermer Bind dans un chroot
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#!/bin/sh
# Gregory Colpart <reg@debian.org>
# chroot (or re-chroot) script for bind9
# tested on Debian Wheezy/Jessie/Stretch
# Exec this script after `(apt-get|aptitude|apt) install bind9`
# and after *each* bind9 upgrade
# When the script is finished, ensure you have
# 'OPTIONS="-u bind -t /var/chroot-bind"' in /etc/default/bind9
# and /etc/init.d/bind9 (re)start
#
# for Jessie/systemd only:
# cp -a /lib/systemd/system/bind9.service /etc/systemd/system/
# and modify section [Service] to have :
# EnvironmentFile=-/etc/default/bind9
# ExecStart=/usr/sbin/named -f $OPTIONS
# essential dirs
mkdir -p /var/chroot-bind
mkdir -p /var/chroot-bind/bin /var/chroot-bind/dev /var/chroot-bind/etc \
/var/chroot-bind/lib /var/chroot-bind/usr/lib \
/var/chroot-bind/usr/sbin /var/chroot-bind/var/cache/bind \
/var/chroot-bind/var/log /var/chroot-bind/var/run/named/ \
/var/chroot-bind/run/named/
# for conf
if [ ! -h "/etc/bind" ]; then
mv /etc/bind/ /var/chroot-bind/etc/
ln -s /var/chroot-bind/etc/bind/ /etc/bind
fi
# for logs
touch /var/chroot-bind/var/log/bind.log
if [ ! -h "/var/log/bind.log" ]; then
ln -s /var/chroot-bind/var/log/bind.log /var/log/bind.log
fi
# for pid
if [ -f "/var/run/named/named.pid" ]; then
cat /var/run/named/named.pid > /var/chroot-bind/var/run/named/named.pid
rm -f /var/run/named/named.pid
fi
if [ ! -e "/var/chroot-bind/dev/random" ]; then
mknod /var/chroot-bind/dev/random c 1 8
chmod 666 /var/chroot-bind/dev/random
fi
if [ ! -e "/var/chroot-bind/dev/urandom" ]; then
mknod /var/chroot-bind/dev/urandom c 1 9
chmod 666 /var/chroot-bind/dev/urandom
fi
# essential dev (hum, null is required ??)
#mknod /var/chroot-bind/dev/null c 1 3
#chmod 666 /var/chroot-bind/dev/{null,random}
# essential libs
for i in `ldd $(which named) | grep -v linux-vdso.so.1 | cut -d">" -f2 | cut -d"(" -f1` \
/usr/lib/x86_64-linux-gnu/openssl-1.0.*/engines/libgost.so ; do
install -D $i /var/chroot-bind/${i##/}
done
# essential (hum, bash is required ??)
#cp /bin/bash /var/chroot-bind/bin/
cp /usr/sbin/named /var/chroot-bind/usr/sbin/
# minimal passwd & group file (hum, is required ??)
#grep "bind\|root" /etc/passwd > /var/chroot-bind/etc/passwd
#grep "bind\|root" /etc/group > /var/chroot-bind/etc/group
# just bind
chown -R bind.bind /var/chroot-bind/