mirror of
https://github.com/tommytran732/Linux-Setup-Scripts
synced 2024-11-08 03:01:34 -05:00
142 lines
5.1 KiB
Bash
142 lines
5.1 KiB
Bash
#!/bin/bash
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#Meant to be run on Ubuntu Pro Minimal
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#The script assumes you already have Ubuntu Pro activated
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#Compliance and updates
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sudo ua enable usg
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sudo apt update -y
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sudo apt full-upgrade -y
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sudo apt install -y usg curl libpam-pwquality
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sudo apt autoremove -y
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sudo usg fix cis_level2_server
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# Remove AIDE
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sudo apt purge -y aide*
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# Setup NTS
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sudo systemctl disable --now systemd-timesyncd
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sudo apt install -y chrony
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sudo curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/chrony.conf -o /etc/chrony/chrony.conf
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sudo systemctl restart chronyd
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# Setup UFW
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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
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sudo ufw allow OpenSSH
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# Harden SSH
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echo "GSSAPIAuthentication no
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echo "VerifyHostKeyDNS yes"" | 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/sshd.service.d
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sudo curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/systemd/system/sshd.service.d/local.conf -o /etc/systemd/system/sshd.service.d/local.conf
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sudo systemctl daemon-reload
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sudo systemctl restart sshd
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# Setup unbound
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sudp apt install -y unbound
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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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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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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 systemctl daemon-reload
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sudo systemctl restart unbound
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sudo systemctl disable --now systemd-resolved
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# Kernel hardening
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sudo curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/modprobe.d/30_security-misc.conf -o /etc/modprobe.d/30_security-misc.conf
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sudo curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/sysctl.d/30_security-misc.conf -o /etc/sysctl.d/30_security-misc.conf
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sudo curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/sysctl.d/30_silent-kernel-printk.conf -o /etc/sysctl.d/30_silent-kernel-printk.conf
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sudo curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/sysctl.d/30_security-misc_kexec-disable.conf -o /etc/sysctl.d/30_security-misc_kexec-disable.conf
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sudo sed -i 's/kernel.yama.ptrace_scope=2/kernel.yama.ptrace_scope=3/g' /etc/sysctl.d/30_security-misc.conf
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sudo sed -i 's/net.ipv4.icmp_echo_ignore_all=1/net.ipv4.icmp_echo_ignore_all=0/g' /etc/sysctl.d/30_security-misc.conf
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sudo sed -i 's/net.ipv6.icmp.echo_ignore_all=1/net.ipv6.icmp.echo_ignore_all=0/g' /etc/sysctl.d/30_security-misc.conf
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sudo systemctl stop apport.service
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sudo systemctl disable apport.service
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sudo systemctl mask apport.service
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sudo systemctl stop whoopsie.service
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sudo systemctl disable whoopsie.service
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sudo systemctl mask whoopsie.service
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#Setup fwupd
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sudo apt install fwupd -y
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mkdir -p /etc/systemd/system/fwupd-refresh.service.d
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echo '[Service]
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ExecStart=/usr/bin/fwupdmgr update' | tee /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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# Setup tuned
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sudo apt install tuned -y
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sudo tuned-adm profile virtual-guest
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# Enable fstrim.timer
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sudo systemctl enable --now fstrim.timer
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