Tomster/Linux-Setup-Scripts
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Linux-Setup-Scripts/Ubuntu-24.04-Server.sh
Tommy afe921fd0c
Typo Fix 
Signed-off-by: Tommy <contact@tommytran.io>
2024-06-26 10:28:27 -07:00

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#!/bin/sh
# Copyright (C) 2021-2024 Thien Tran
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.
#Meant to be run on Ubuntu Pro Minimal
output(){
printf '\e[1;34m%-6s\e[m\n' "${@}"
}
unpriv(){
sudo -u nobody "$@"
}
virtualization=$(systemd-detect-virt)
# Compliance and updates
sudo systemctl mask debug-shell.service
echo 'Authorized uses only. All activity may be monitored and reported.' | sudo tee /etc/issue
echo 'Authorized uses only. All activity may be monitored and reported.' | sudo tee /etc/issue.net
# Setting umask to 077
umask 077
sudo sed -i 's/^UMASK.*/UMASK 077/g' /etc/login.defs
sudo sed -i 's/^HOME_MODE/#HOME_MODE/g' /etc/login.defs
sudo sed -i 's/^USERGROUPS_ENAB.*/USERGROUPS_ENAB no/g' /etc/login.defs
# Make home directory private
sudo chmod 700 /home/*
# Setup NTS
sudo systemctl disable --now systemd-timesyncd
sudo systemctl mask systemd-timesyncd
sudo apt install -y chrony
unpriv curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/chrony.conf | sudo tee /etc/chrony/chrony.conf
sudo chmod 644 /etc/chrony/chrony.conf
sudo systemctl restart chronyd
# Harden SSH
unpriv curl https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/ssh/sshd_config.d/10-custom.conf | sudo tee /etc/ssh/sshd_config.d/10-custom.conf
sudo chmod 644 /etc/ssh/sshd_config.d/10-custom.conf
unpriv curl https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/ssh/ssh_config.d/10-custom.conf | sudo tee /etc/ssh/ssh_config.d/10-custom.conf
sudo chmod 644 /etc/ssh/ssh_config.d/10-custom.conf
sudo mkdir -p /etc/systemd/system/ssh.service.d
unpriv curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/systemd/system/sshd.service.d/local.conf | sudo tee /etc/systemd/system/ssh.service.d/override.conf
sudo chmod 644 /etc/systemd/system/ssh.service.d/override.conf
sudo systemctl daemon-reload
sudo systemctl restart ssh
# Security kernel settings
unpriv curl https://raw.githubusercontent.com/secureblue/secureblue/live/config/files/usr/etc/modprobe.d/blacklist.conf | sudo tee /etc/modprobe.d/server-blacklist.conf
sudo chmod 644 /etc/modprobe.d/server-blacklist.conf
unpriv curl https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/sysctl.d/99-server.conf | sudo tee /etc/sysctl.d/99-server.conf
sudo chmod 644 /etc/sysctl.d/99-server.conf
sudo sysctl -p
# Rebuild initramfs
sudo update-initramfs -u
# Disable coredump
unpriv curl https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/security/limits.d/30-disable-coredump.conf | sudo tee /etc/security/limits.d/30-disable-coredump.conf
sudo chmod 644 /etc/security/limits.d/30-disable-coredump.conf
sudo mkdir -p /etc/systemd/coredump.conf.d
sudo chmod 755 /etc/systemd/coredump.conf.d
unpriv curl https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/systemd/coredump.conf.d/disable.conf | sudo tee /etc/systemd/coredump.conf.d/disable.conf
sudo chmod 644 /etc/systemd/coredump.conf.d/disable.conf
# Update GRUB config
if [ ! -d /boot/efi/EFI/ZBM ]; then
# shellcheck disable=SC2016
sed -i 's/splash/splash mitigations=auto,nosmt spectre_v2=on spectre_bhi=on spec_store_bypass_disable=on tsx=off kvm.nx_huge_pages=force nosmt=force l1d_flush=on spec_rstack_overflow=safe-ret gather_data_sampling=force reg_file_data_sampling=on random.trust_bootloader=off random.trust_cpu=off intel_iommu=on amd_iommu=force_isolation efi=disable_early_pci_dma iommu=force iommu.passthrough=0 iommu.strict=1 slab_nomerge init_on_alloc=1 init_on_free=1 pti=on vsyscall=none ia32_emulation=0 page_alloc.shuffle=1 randomize_kstack_offset=on debugfs=off console=tty0 console=ttyS0,115200/g' /etc/default/grub
sudo update-grub
fi
# Disable telemetry
sudo systemctl disable --now apport.service
sudo systemctl mask apport.service
## Avoid phased updates
sudo apt install -y curl
unpriv curl https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/apt/apt.conf.d/99sane-upgrades | sudo tee /etc/apt/apt.conf.d/99sane-upgrades
sudo chmod 644 /etc/apt/apt.conf.d/99sane-upgrades
sudo apt update -y
sudo apt full-upgrade -y
sudo apt autoremove -y
## Install basic sysadmin tools
sudo apt install -y nano iputils-ping
# Install appropriate virtualization drivers
if [ "$virtualization" = 'kvm' ]; then
sudo apt install -y qemu-guest-agent
fi
# Enable fstrim.timer
sudo systemctl enable --now fstrim.timer
### Differentiating bare metal and virtual installs
# Setup tuned
sudo apt install -y tuned
sudo systemctl enable --now tuned
if [ "$virtualization" = 'none' ]; then
sudo tuned-adm profile latency-performance
else
sudo tuned-adm profile virtual-guest
fi
# Setup fwupd
if [ "$virtualization" = 'none' ]; then
sudo apt install -y fwupd
echo 'UriSchemes=file;https' | sudo tee -a /etc/fwupd/fwupd.conf
sudo systemctl restart fwupd
mkdir -p /etc/systemd/system/fwupd-refresh.service.d
unpriv curl https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/systemd/system/fwupd-refresh.service.d/override.conf | sudo tee /etc/systemd/system/fwupd-refresh.service.d/override.conf
sudo chmod 644 /etc/systemd/system/fwupd-refresh.service.d/override.conf
sudo systemctl daemon-reload
sudo systemctl enable --now fwupd-refresh.timer
fi
# Setup unbound
sudo apt install -y unbound dns-root-data
echo 'server:
trust-anchor-signaling: yes
root-key-sentinel: yes
tls-cert-bundle: /etc/ssl/certs/ca-certificates.crt
hide-identity: yes
hide-trustanchor: yes
hide-version: yes
deny-any: yes
harden-algo-downgrade: yes
harden-large-queries: yes
harden-referral-path: yes
ignore-cd-flag: yes
max-udp-size: 3072
module-config: "validator iterator"
qname-minimisation-strict: yes
unwanted-reply-threshold: 10000000
use-caps-for-id: yes
outgoing-port-permit: 1024-65535
prefetch: yes
prefetch-key: yes
# ip-transparent: yes
# interface: 127.0.0.1
# interface: ::1
# interface: 242.242.0.1
# access-control: 242.242.0.0/16 allow
forward-zone:
name: "."
forward-tls-upstream: yes
forward-addr: 1.1.1.2@853#security.cloudflare-dns.com
forward-addr: 1.0.0.2@853#security.cloudflare-dns.com
forward-addr: 2606:4700:4700::1112@853#security.cloudflare-dns.com
forward-addr: 2606:4700:4700::1002@853#security.cloudflare-dns.com' | sudo tee /etc/unbound/unbound.conf.d/custom.conf
sudo chmod 644 /etc/unbound/unbound.conf.d/custom.conf
sudo mkdir -p /etc/systemd/system/unbound.service.d
unpriv curl https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/systemd/system/unbound.service.d/override-chroot.conf | sudo tee /etc/systemd/system/unbound.service.d/override.conf
sudo chmod 644 /etc/systemd/system/unbound.service.d/override.conf
sudo systemctl daemon-reload
sudo systemctl restart unbound
sudo systemctl disable systemd-resolved
# Setup networking
# UFW Snap is strictly confined, unlike its .deb counterpart
sudo apt purge -y ufw
sudo apt install -y snapd
sudo snap install ufw
sudo ufw enable -y
sudo ufw allow SSH
sudo reboot
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