#!/bin/bash echo 'GSSAPIAuthentication no VerifyHostKeyDNS yes' | sudo tee /etc/ssh/ssh_config.d/10-custom.conf sudo sed -i 's/#GSSAPIAuthentication no/GSSAPIAuthentication no/g' /etc/ssh/sshd_config sudo systemctl restart sshd sudo find /etc/apt/sources.list.d -type f -exec sudo sed -i 's/http:/https:/g' {} \; sudo apt update sudo apt upgrade -y sudo apt install -y --no-install-recommends tuned unbound ufw sudo tuned-adm profile virtual-guest echo 'server: trust-anchor-signaling: yes root-key-sentinel: yes 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 outgoing-port-avoid: 51820 prefetch: yes prefetch-key: yes forward-zone: name: "." forward-tls-upstream: yes forward-addr: 8.8.8.8#dns.google forward-addr: 8.8.4.4#dns.google forward-addr: 2001:4860:4860::8888#dns.google forward-addr: 2001:4860:4860::8844#dns.google' | sudo tee /etc/unbound/unbound.conf.d/custom.conf mkdir -p /etc/systemd/system/unbound.service.d echo $'[Service] CapabilityBoundingSet=CAP_NET_BIND_SERVICE CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_SYS_RESOURCE CAP_NET_RAW MemoryDenyWriteExecute=true NoNewPrivileges=true PrivateDevices=true PrivateTmp=true ProtectHome=true ProtectClock=true ProtectControlGroups=true ProtectKernelLogs=true ProtectKernelModules=true # This breaks using socket options like \'so-rcvbuf\'. Explicitly disable for visibility. ProtectKernelTunables=false ProtectProc=invisible ProtectSystem=strict RuntimeDirectory=unbound ConfigurationDirectory=unbound StateDirectory=unbound RestrictAddressFamilies=AF_INET AF_INET6 AF_NETLINK AF_UNIX RestrictRealtime=true SystemCallArchitectures=native SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module mount @obsolete @resources RestrictNamespaces=yes LockPersonality=yes RestrictSUIDSGID=yes ReadWritePaths=@UNBOUND_RUN_DIR@ @UNBOUND_CHROOT_DIR@ # Below rules are needed when chroot is enabled (usually it\'s enabled by default). # If chroot is disabled like chroot: "" then they may be safely removed. TemporaryFileSystem=@UNBOUND_CHROOT_DIR@/dev:ro TemporaryFileSystem=@UNBOUND_CHROOT_DIR@/run:ro BindReadOnlyPaths=-/run/systemd/notify:@UNBOUND_CHROOT_DIR@/run/systemd/notify BindReadOnlyPaths=-/dev/urandom:@UNBOUND_CHROOT_DIR@/dev/urandom BindPaths=-/dev/log:@UNBOUND_CHROOT_DIR@/dev/log' | sudo tee /etc/systemd/system/unbound.service.d/override.conf sudo systemctl restart unbound sudo mkdir -p /etc/systemd/system/sshd.service.d sudo curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/systemd/system/sshd.service.d/limits.conf -o /etc/systemd/system/sshd.service.d/limits.conf sudo rm -rf /etc/chrony/chrony.conf sudo curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/chrony.conf -o /etc/chrony/chrony.conf sudo systemctl restart chronyd 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 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 sudo sed -i 's/kernel.yama.ptrace_scope=2/kernel.yama.ptrace_scope=3/g' /etc/sysctl.d/30_security-misc.conf 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 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 sudo mkdir -p /etc/systemd/system/NetworkManager.service.d sudo curl https://gitlab.com/divested/brace/-/raw/master/brace/usr/lib/systemd/system/NetworkManager.service.d/99-brace.conf -o /etc/systemd/system/NetworkManager.service.d/99-brace.conf echo "* hard core 0" | tee -a /etc/security/limits.conf