mirror of
https://github.com/mail-in-a-box/mailinabox.git
synced 2024-11-25 02:47:04 +00:00
78 lines
3.1 KiB
Bash
Executable File
78 lines
3.1 KiB
Bash
Executable File
source setup/functions.sh # load our functions
|
|
|
|
# Base system configuration.
|
|
|
|
echo Updating system packages...
|
|
hide_output apt-get update
|
|
hide_output apt-get -y upgrade
|
|
|
|
# Install basic utilities.
|
|
#
|
|
# haveged: Provides extra entropy to /dev/random so it doesn't stall
|
|
# when generating random numbers for private keys (e.g. during
|
|
# ldns-keygen).
|
|
# unattended-upgrades: Apt tool to install security updates automatically.
|
|
# ntp: keeps the system time correct
|
|
# fail2ban: scans log files for repeated failed login attempts and blocks the remote IP at the firewall
|
|
|
|
apt_install python3 python3-pip \
|
|
wget curl bind9-host \
|
|
haveged unattended-upgrades ntp fail2ban
|
|
|
|
# Allow apt to install system updates automatically every day.
|
|
|
|
cat > /etc/apt/apt.conf.d/02periodic <<EOF;
|
|
APT::Periodic::MaxAge "7";
|
|
APT::Periodic::Update-Package-Lists "1";
|
|
APT::Periodic::Unattended-Upgrade "1";
|
|
APT::Periodic::Verbose "1";
|
|
EOF
|
|
|
|
if [ -z "$DISABLE_FIREWALL" ]; then
|
|
# Turn on the firewall. First allow incoming SSH, then turn on the firewall.
|
|
# Other ports will be opened at the point where we set up those services.
|
|
#
|
|
# Various virtualized environments like Docker and some VPSs don't provide
|
|
# a kernel that supports iptables. To avoid error-like output in these cases,
|
|
# let us disable the firewall.
|
|
apt_install ufw
|
|
ufw_allow ssh;
|
|
ufw --force enable;
|
|
fi
|
|
|
|
# Resolve DNS using bind9 locally, rather than whatever DNS server is supplied
|
|
# by the machine's network configuration. We do this to ensure that DNS queries
|
|
# that *we* make (i.e. looking up other external domains) perform DNSSEC checks.
|
|
# We could use Google's Public DNS, but we don't want to create a dependency on
|
|
# Google per our goals of decentralization. bind9, as packaged for Ubuntu, has
|
|
# DNSSEC enabled by default via "dnssec-validation auto".
|
|
#
|
|
# So we'll be running bind9 bound to 127.0.0.1 for locally-issued DNS queries
|
|
# and nsd bound to the public ethernet interface for remote DNS queries asking
|
|
# about our domain names. nsd is configured in dns.sh.
|
|
#
|
|
# About the settings:
|
|
#
|
|
# * RESOLVCONF=yes will have bind9 take over /etc/resolv.conf to tell
|
|
# local services that DNS queries are handled on localhost.
|
|
# * Adding -4 to OPTIONS will have bind9 not listen on IPv6 addresses
|
|
# so that we're sure there's no conflict with nsd, our public domain
|
|
# name server, on IPV6.
|
|
# * The listen-on directive in named.conf.options restricts bind9 to
|
|
# binding to the loopback interface instead of all interfaces.
|
|
apt_install bind9 resolvconf
|
|
tools/editconf.py /etc/default/bind9 \
|
|
RESOLVCONF=yes \
|
|
"OPTIONS=\"-u bind -4\""
|
|
if ! grep -q "listen-on " /etc/bind/named.conf.options; then
|
|
# Add a listen-on directive if it doesn't exist inside the options block.
|
|
sed -i "s/^}/\n\tlisten-on { 127.0.0.1; };\n}/" /etc/bind/named.conf.options
|
|
fi
|
|
if [ -f /etc/resolvconf/resolv.conf.d/original ]; then
|
|
echo "Archiving old resolv.conf (was /etc/resolvconf/resolv.conf.d/original, now /etc/resolvconf/resolv.conf.original)."
|
|
mv /etc/resolvconf/resolv.conf.d/original /etc/resolvconf/resolv.conf.original
|
|
fi
|
|
|
|
restart_service bind9
|
|
restart_service resolvconf
|