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https://github.com/tommytran732/Linux-Setup-Scripts
synced 2024-11-22 17:41:32 -05:00
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#!/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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#Please note that this is how I PERSONALLY setup my computer - I do some stuff such as not using anything to download GNOME extensions from extensions.gnome.org and installing the extensions as a package instead
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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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# Increase compression level
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sudo sed -i 's/zstd:1/zstd:3/g' /etc/fstab
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# Compliance
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sudo systemctl mask debug-shell.service
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sudo systemctl mask kdump.service
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# Setting umask to 077
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umask 077
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sudo sed -i 's/umask 022/umask 077/g' /etc/bashrc
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echo 'umask 077' | sudo tee -a /etc/bashrc
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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 rm -rf /etc/chrony.conf
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unpriv curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/chrony.conf | sudo tee /etc/chrony.conf
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unpriv curl https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/sysconfig/chronyd | sudo tee /etc/sysconfig/chronyd
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sudo systemctl restart chronyd
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# Remove nullok
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sudo /usr/bin/sed -i 's/\s+nullok//g' /etc/pam.d/system-auth
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# Harden SSH
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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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# Security kernel settings
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unpriv curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/modprobe.d/30_security-misc.conf | sudo tee /etc/modprobe.d/30_security-misc.conf
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sudo chmod 644 /etc/modprobe.d/30_security-misc.conf
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sudo sed -i 's/#install msr/install msr/g' /etc/modprobe.d/30_security-misc.conf
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sudo sed -i 's/# install bluetooth/install bluetooth/g' /etc/modprobe.d/30_security-misc.conf
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sudo sed -i 's/# install btusb/install btusb/g' /etc/modprobe.d/30_security-misc.conf
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unpriv curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/990-security-misc.conf | sudo tee /etc/sysctl.d/990-security-misc.conf
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sudo chmod 644 /etc/sysctl.d/990-security-misc.conf
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sudo sed -i 's/kernel.yama.ptrace_scope=2/kernel.yama.ptrace_scope=3/g' /etc/sysctl.d/990-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/990-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/990-security-misc.conf
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unpriv curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/30_silent-kernel-printk.conf | sudo tee /etc/sysctl.d/30_silent-kernel-printk.conf
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sudo chmod 644 /etc/sysctl.d/30_silent-kernel-printk.conf
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unpriv curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/30_security-misc_kexec-disable.conf | sudo tee /etc/sysctl.d/30_security-misc_kexec-disable.conf
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sudo chmod 644 /etc/sysctl.d/30_security-misc_kexec-disable.conf
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sudo dracut -f
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sudo sysctl -p
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if [ -d /boot/loader ]; then
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sudo sed -i 's/quiet root/quiet mitigations=auto,nosmt spectre_v2=on spec_store_bypass_disable=on tsx=off kvm.nx_huge_pages=force nosmt=force l1d_flush=on spec_rstack_overflow=safe-ret 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 lockdown=confidentiality module.sig_enforce=1 root/g' /etc/kernel/cmdline
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sudo dnf -y reinstall kernel-core
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else
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sudo grubby --update-kernel=ALL --args='mitigations=auto,nosmt spectre_v2=on spec_store_bypass_disable=on tsx=off kvm.nx_huge_pages=force nosmt=force l1d_flush=on spec_rstack_overflow=safe-ret 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 lockdown=confidentiality module.sig_enforce=1'
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fi
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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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# Setup ZRAM
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echo -e '[zram0]\nzram-fraction = 1\nmax-zram-size = 8192\ncompression-algorithm = zstd' | sudo tee /etc/systemd/zram-generator.conf
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# Setup DNF
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unpriv curl https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/dnf/dnf.conf | sudo tee /etc/dnf/dnf.conf
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sudo sed -i 's/^metalink=.*/&\&protocol=https/g' /etc/yum.repos.d/*
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# Enable auto TRIM
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sudo systemctl enable fstrim.timer
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# Setup 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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### Differentiating bare metal and virtual installs
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# Installing tuned first here because virt-what is 1 of its dependencies anyways
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sudo dnf install tuned -y
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virt_type=$(virt-what)
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if [ "$virt_type" = '' ]; then
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output 'Virtualization: Bare Metal.'
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elif [ "$virt_type" = 'openvz lxc' ]; then
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output 'Virtualization: OpenVZ 7.'
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elif [ "$virt_type" = 'xen xen-hvm' ]; then
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output 'Virtualization: Xen-HVM.'
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elif [ "$virt_type" = 'xen xen-hvm aws' ]; then
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output 'Virtualization: Xen-HVM on AWS.'
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else
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output "Virtualization: $virt_type."
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fi
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# Setup tuned
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if [ "$virt_type" = '' ]; then
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sudo tuned-adm profile latency-performance
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else
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if [ "$virt_type" = 'kvm' ]; then
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sudo dnf install qemu-guest-agent -y
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fi
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sudo tuned-adm profile virtual-guest
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fi
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# Setup real-ucode and hardened_malloc
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MACHINE_TYPE=$(uname -m)
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if [ "$virt_type" = '' ] || [ "${MACHINE_TYPE}" == 'x86_64' ]; then
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sudo dnf install 'https://divested.dev/rpm/fedora/divested-release-20231210-2.noarch.rpm' -y
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sudo sed -i 's/^metalink=.*/&?protocol=https/g' /etc/yum.repos.d/divested-release.repo
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if [ "${MACHINE_TYPE}" != 'x86_64' ]; then
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sudo dnf config-manager --save --setopt=divested.includepkgs=divested-release,real-ucode,microcode_ctl,amd-ucode-firmware
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sudo dnf install real-ucode -y
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sudo dracut -f
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elif [ "$virt_type" != '' ]; then
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sudo dnf config-manager --save --setopt=divested.includepkgs=divested-release,hardened_malloc
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sudo dnf install hardened_malloc -y
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else
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sudo dnf config-manager --save --setopt=divested.includepkgs=divested-release,real-ucode,microcode_ctl,amd-ucode-firmware,hardened_malloc
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sudo dnf install real-ucode hardened_malloc -y
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echo 'libhardened_malloc.so' | sudo tee /etc/ld.so.preload
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sudo dracut -f
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fi
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elif [ "${MACHINE_TYPE}" == 'aarch64' ]; then
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sudo dnf copr enable secureblue/hardened_malloc -y
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sudo dnf install hardened_malloc -y
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fi
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# Setup Networking
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sudo firewall-cmd --set-default-zone=block
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sudo firewall-cmd --permanent --add-service=dhcpv6-client
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sudo firewall-cmd --reload
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sudo firewall-cmd --lockdown-on
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sudo mkdir -p /etc/systemd/system/NetworkManager.service.d
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unpriv curl https://gitlab.com/divested/brace/-/raw/master/brace/usr/lib/systemd/system/NetworkManager.service.d/99-brace.conf | sudo tee /etc/systemd/system/NetworkManager.service.d/99-brace.conf
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sudo systemctl daemon-reload
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sudo systemctl restart NetworkManager
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@ -67,11 +67,11 @@ sudo sed -i 's/#install msr/install msr/g' /etc/modprobe.d/30_security-misc.conf
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sudo sed -i 's/# install bluetooth/install bluetooth/g' /etc/modprobe.d/30_security-misc.conf
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sudo sed -i 's/# install bluetooth/install bluetooth/g' /etc/modprobe.d/30_security-misc.conf
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sudo sed -i 's/# install btusb/install btusb/g' /etc/modprobe.d/30_security-misc.conf
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sudo sed -i 's/# install btusb/install btusb/g' /etc/modprobe.d/30_security-misc.conf
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unpriv curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/990-security-misc.conf | sudo tee /etc/sysctl.d/990-security-misc.conf
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unpriv curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/990-security-misc.conf | sudo tee /etc/sysctl.d/990-security-misc.conf
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unpriv curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/30_silent-kernel-printk.conf | sudo tee /etc/sysctl.d/30_silent-kernel-printk.conf
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unpriv curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/30_security-misc_kexec-disable.conf | sudo tee /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/990-security-misc.conf
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sudo sed -i 's/kernel.yama.ptrace_scope=2/kernel.yama.ptrace_scope=3/g' /etc/sysctl.d/990-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/990-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/990-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/990-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/990-security-misc.conf
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unpriv curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/30_silent-kernel-printk.conf | sudo tee /etc/sysctl.d/30_silent-kernel-printk.conf
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unpriv curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/30_security-misc_kexec-disable.conf | sudo tee /etc/sysctl.d/30_security-misc_kexec-disable.conf
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sudo sysctl -p
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sudo sysctl -p
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# Rebuild initramfs
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# Rebuild initramfs
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@ -1,4 +0,0 @@
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[zram0]
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zram-fraction = 1
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max-zram-size = 8192
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compression-algorithm = zstd
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