mirror of
https://github.com/tommytran732/Linux-Setup-Scripts
synced 2024-09-18 21:24:43 -04:00
233 lines
8.8 KiB
Bash
233 lines
8.8 KiB
Bash
#!/bin/bash
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# Copyright (C) 2021-2024 Thien Tran
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may not
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# use this file except in compliance with the License. You may obtain a copy of
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# the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations under
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# the License.
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#Meant to be run on Ubuntu Pro Minimal
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output(){
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echo -e '\e[36m'"$1"'\e[0m';
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}
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unpriv(){
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sudo -u nobody "$@"
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}
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virtualization=$(systemd-detect-virt)
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# Compliance and updates
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sudo systemctl mask debug-shell.service
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echo 'Authorized uses only. All activity may be monitored and reported.' | sudo tee /etc/issue
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echo 'Authorized uses only. All activity may be monitored and reported.' | sudo tee /etc/issue.net
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# Setting umask to 077
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umask 077
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sudo sed -i 's/^UMASK.*/UMASK 077/g' /etc/login.defs
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sudo sed -i 's/^HOME_MODE/#HOME_MODE/g' /etc/login.defs
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sudo sed -i 's/^USERGROUPS_ENAB.*/USERGROUPS_ENAB no/g' /etc/login.defs
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# Make home directory private
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sudo chmod 700 /home/*
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# Setup NTS
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sudo systemctl disable --now systemd-timesyncd
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sudo systemctl mask systemd-timesyncd
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sudo apt install -y chrony
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unpriv curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/chrony.conf | sudo tee /etc/chrony/chrony.conf
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sudo chmod 644 /etc/chrony/chrony.conf
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sudo systemctl restart chronyd
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# Harden SSH
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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
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sudo chmod 644 /etc/ssh/sshd_config.d/10-custom.conf
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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
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sudo chmod 644 /etc/ssh/ssh_config.d/10-custom.conf
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sudo mkdir -p /etc/systemd/system/ssh.service.d
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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
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sudo chmod 644 /etc/systemd/system/ssh.service.d/override.conf
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sudo systemctl daemon-reload
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sudo systemctl restart ssh
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# Security kernel settings
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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
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sudo chmod 644 /etc/modprobe.d/server-blacklist.conf
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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
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sudo chmod 644 /etc/sysctl.d/99-server.conf
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sudo sysctl -p
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# Rebuild initramfs
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sudo update-initramfs -u
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# Disable coredump
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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
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sudo chmod 644 /etc/security/limits.d/30-disable-coredump.conf
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sudo mkdir -p /etc/systemd/coredump.conf.d
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sudo chmod 755 /etc/systemd/coredump.conf.d
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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
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sudo chmod 644 /etc/systemd/coredump.conf.d/disable.conf
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# Update GRUB config
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if [ ! -d /boot/efi/EFI/ZBM ]; then
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# shellcheck disable=SC2016
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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
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sudo update-grub
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fi
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# Disable telemetry
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sudo systemctl disable --now apport.service
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sudo systemctl mask apport.service
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## Avoid phased updates
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sudo apt install -y curl
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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
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sudo chmod 644 /etc/apt/apt.conf.d/99sane-upgrades
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sudo apt update -y
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sudo apt full-upgrade -y
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sudo apt autoremove -y
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## Install basic sysadmin tools
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sudo apt install -y nano iputils-ping
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# Install appropriate virtualization drivers
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if [ "$virtualization" = 'kvm' ]; then
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sudo apt install -y qemu-guest-agent
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fi
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# Enable fstrim.timer
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sudo systemctl enable --now fstrim.timer
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### Differentiating bare metal and virtual installs
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# Setup tuned
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sudo apt install -y tuned
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sudo systemctl enable --now tuned
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if [ "$virtualization" = 'none' ]; then
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sudo tuned-adm profile latency-performance
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else
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sudo tuned-adm profile virtual-guest
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fi
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# Setup fwupd
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if [ "$virtualization" = 'none' ]; then
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sudo apt install -y fwupd
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echo 'UriSchemes=file;https' | sudo tee -a /etc/fwupd/fwupd.conf
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sudo systemctl restart fwupd
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mkdir -p /etc/systemd/system/fwupd-refresh.service.d
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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
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sudo chmod 644 /etc/systemd/system/fwupd-refresh.service.d/override.conf
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sudo systemctl daemon-reload
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sudo systemctl enable --now fwupd-refresh.timer
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fi
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# # Setup unbound
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# sudo apt install -y unbound unbound-anchor
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# sudo mkdir -p /usr/share/dns
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# sudo chmod 755 /usr/share/dns
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# sudo chown unbound:unbound /usr/share/dns
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# sudo unbound-anchor
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# sudo chmod 644 /usr/share/dns/root.key
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# echo 'server:
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# trust-anchor-signaling: yes
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# root-key-sentinel: yes
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# tls-cert-bundle: /etc/ssl/certs/ca-certificates.crt
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# hide-identity: yes
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# hide-trustanchor: yes
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# hide-version: yes
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# deny-any: yes
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# harden-algo-downgrade: yes
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# harden-large-queries: yes
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# harden-referral-path: yes
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# ignore-cd-flag: yes
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# max-udp-size: 3072
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# module-config: "validator iterator"
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# qname-minimisation-strict: yes
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# unwanted-reply-threshold: 10000000
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# use-caps-for-id: yes
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# outgoing-port-permit: 1024-65535
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# prefetch: yes
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# prefetch-key: yes
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# # ip-transparent: yes
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# # interface: 127.0.0.1
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# # interface: ::1
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# # interface: 242.242.0.1
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# # access-control: 242.242.0.0/16 allow
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# forward-zone:
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# name: "."
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# forward-tls-upstream: yes
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# forward-addr: 1.1.1.2@853#security.cloudflare-dns.com
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# forward-addr: 1.0.0.2@853#security.cloudflare-dns.com
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# forward-addr: 2606:4700:4700::1112@853#security.cloudflare-dns.com
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# forward-addr: 2606:4700:4700::1002@853#security.cloudflare-dns.com' | sudo tee /etc/unbound/unbound.conf.d/custom.conf
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# sudo chmod 644 /etc/unbound/unbound.conf.d/custom.conf
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# sudo sed -i 's#/var/lib/unbound#/usr/share/dns#g' /etc/unbound/unbound.conf.d/root-auto-trust-anchor-file.conf
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# mkdir -p /etc/systemd/system/unbound.service.d
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# echo $'[Service]
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# CapabilityBoundingSet=CAP_NET_BIND_SERVICE CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_SYS_RESOURCE CAP_NET_RAW
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# MemoryDenyWriteExecute=true
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# NoNewPrivileges=true
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# PrivateDevices=true
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# PrivateTmp=true
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# ProtectHome=true
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# ProtectClock=true
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# ProtectControlGroups=true
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# ProtectKernelLogs=true
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# ProtectKernelModules=true
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# # This breaks using socket options like \'so-rcvbuf\'. Explicitly disable for visibility.
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# ProtectKernelTunables=false
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# ProtectProc=invisible
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# RestrictAddressFamilies=AF_INET AF_INET6 AF_NETLINK AF_UNIX
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# RestrictRealtime=true
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# SystemCallArchitectures=native
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# SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module mount @obsolete @resources
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# RestrictNamespaces=yes
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# LockPersonality=yes
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# RestrictSUIDSGID=yes
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# ReadWritePaths=@UNBOUND_RUN_DIR@ @UNBOUND_CHROOT_DIR@
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# # Below rules are needed when chroot is enabled (usually it\'s enabled by default).
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# # If chroot is disabled like chroot: "" then they may be safely removed.
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# TemporaryFileSystem=@UNBOUND_CHROOT_DIR@/dev:ro
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# TemporaryFileSystem=@UNBOUND_CHROOT_DIR@/run:ro
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# BindReadOnlyPaths=-/run/systemd/notify:@UNBOUND_CHROOT_DIR@/run/systemd/notify
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# BindReadOnlyPaths=-/dev/urandom:@UNBOUND_CHROOT_DIR@/dev/urandom
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# BindPaths=-/dev/log:@UNBOUND_CHROOT_DIR@/dev/log' | sudo tee /etc/systemd/system/unbound.service.d/override.conf
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# sudo chmod 644 /etc/systemd/system/unbound.service.d/override.conf
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# sudo systemctl daemon-reload
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# sudo systemctl restart unbound
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# sudo systemctl disable systemd-resolved
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# Setup networking
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# UFW Snap is strictly confined, unlike its .deb counterpart
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sudo apt purge -y ufw
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sudo snap install ufw
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sudo ufw enable -y
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sudo ufw allow SSH
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sudo reboot
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