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mailinabox/setup/system.sh
Joshua Tauberer dd6a8d9998 upgrade to ownCloud 8.0.2
The contacts and calendar apps are now maintained outside of ownCloud core, so we now pull them in from github tags and must enable them explicitly.
2015-03-28 11:08:57 -04:00

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source setup/functions.sh # load our functions
# Basic System Configuration
# -------------------------
# ### Install Packages
# Update system packages to make sure we have the latest upstream versions of things from Ubuntu.
echo Updating system packages...
hide_output apt-get update
apt_get_quiet 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.
# * cron: Runs background processes periodically.
# * ntp: keeps the system time correct
# * fail2ban: scans log files for repeated failed login attempts and blocks the remote IP at the firewall
# * git: we install some things directly from github
# * sudo: allows privileged users to execute commands as root without being root
# * coreutils: includes `nproc` tool to report number of processors
# * bc: allows us to do math to compute sane defaults
apt_install python3 python3-dev python3-pip \
wget curl git sudo coreutils bc \
haveged unattended-upgrades cron 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
# ### Firewall
# Various virtualized environments like Docker and some VPSs don't provide #NODOC
# a kernel that supports iptables. To avoid error-like output in these cases, #NODOC
# we skip this if the user sets DISABLE_FIREWALL=1. #NODOC
if [ -z "$DISABLE_FIREWALL" ]; then
# Install `ufw` which provides a simple firewall configuration.
apt_install ufw
# Allow incoming connections to SSH.
ufw_allow ssh;
# ssh might be running on an alternate port. Use sshd -T to dump sshd's #NODOC
# settings, find the port it is supposedly running on, and open that port #NODOC
# too. #NODOC
SSH_PORT=$(sshd -T 2>/dev/null | grep "^port " | sed "s/port //") #NODOC
if [ ! -z "$SSH_PORT" ]; then
if [ "$SSH_PORT" != "22" ]; then
echo Opening alternate SSH port $SSH_PORT. #NODOC
ufw_allow $SSH_PORT #NODOC
fi
fi
ufw --force enable;
fi #NODOC
# ### Local DNS Service
# Install a local DNS server, rather than using the DNS server provided by the
# ISP'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 later.
#
# 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)." #NODOC
mv /etc/resolvconf/resolv.conf.d/original /etc/resolvconf/resolv.conf.original #NODOC
fi
# Restart the DNS services.
restart_service bind9
restart_service resolvconf
# ### Fail2Ban Service
# Configure the Fail2Ban installation to prevent dumb bruce-force attacks against dovecot, postfix and ssh
cp conf/fail2ban/jail.local /etc/fail2ban/jail.local
cp conf/fail2ban/dovecotimap.conf /etc/fail2ban/filter.d/dovecotimap.conf
restart_service fail2ban