# Copyright (C) 2023 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. variant: fcos version: 1.5.0 passwd: users: - name: tomster ssh_authorized_keys: - ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINkTKkJS7Id1WCyA5Klu/moLG9mP5hTC+v2qYqypMF1u contact@tommytran.io groups: - wheel - sudo - name: unpriv systemd: units: - name: postinst.service enabled: true contents: | [Unit] Description=Initial System Setup # We run after `systemd-machine-id-commit.service` to ensure that # `ConditionFirstBoot=true` services won't rerun on the next boot. After=systemd-machine-id-commit.service After=network-online.target # We run before `zincati.service` to avoid conflicting rpm-ostree # transactions. Before=zincati.service ConditionPathExists=!/var/lib/%N.stamp [Service] Type=oneshot RemainAfterExit=yes ExecStart=/usr/bin/sudo -u unpriv /usr/bin/curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/chrony.conf | /usr/bin/tee /etc/chrony.conf ExecStart=/usr/bin/echo "allow 10.0.2.2/32" >> /etc/chrony.conf ExecStart=/usr/bin/systemctl restart chronyd ExecStart=/usr/bin/rpm-ostree install auditd firewalld qemu-guest-agent tuned unbound ExecStart=/usr/bin/rpm-ostree override remove cifs-utils containerd moby-engine runc samba-common-libs samba-client-libs libsmbclient libwbclient samba-common sssd-krb5-common sssd-ipa sssd-nfs-idmap sssd-ldap sssd-client sssd-ad sssd-common sssd-krb5 sssd-common-pac ExecStart=/usr/bin/sed -i 's/nullok//g' /etc/pam.d/system-auth ExecStart=/usr/bin/sudo -u unpriv /usr/bin/curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/modprobe.d/30_security-misc.conf | /usr/bin/tee /etc/modprobe.d/30_security-misc.conf ExecStart=/usr/bin/curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/990-security-misc.conf -o /etc/sysctl.d/990-security-misc.conf ExecStart=/usr/bin/sed -i 's/kernel.yama.ptrace_scope=2/kernel.yama.ptrace_scope=1/g' /etc/sysctl.d/990-security-misc.conf ExecStart=/usr/bin/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 ExecStart=/usr/bin/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 ExecStart=/usr/bin/sudo -u unpriv /usr/bin/curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/lib/sysctl.d/sysctl.d/30_silent-kernel-printk.conf | /usr/bin/tee /etc/sysctl.d/30_silent-kernel-printk.conf ExecStart=/usr/bin/sudo -u unpriv /usr/bin/curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/lib/sysctl.d/sysctl.d/30_security-misc_kexec-disable.conf | /usr/bin/tee /etc/sysctl.d/30_security-misc_kexec-disable.conf ExecStart=/usr/bin/mkdir -p /etc/systemd/system/NetworkManager.service.d ExecStart=/usr/bin/sudo -u unpriv /usr/bin/curl https://gitlab.com/divested/brace/-/raw/master/brace/usr/lib/systemd/system/NetworkManager.service.d/99-brace.conf | /usr/bin/tee /etc/systemd/system/NetworkManager.service.d/99-brace.conf ExecStart=/usr/bin/mkdir -p /etc/systemd/system/irqbalance.service.d ExecStart=/usr/bin/sudo -u unpriv /usr/bin/curl https://gitlab.com/divested/brace/-/raw/master/brace/usr/lib/systemd/system/irqbalance.service.d/99-brace.conf | /usr/bin/tee /etc/systemd/system/irqbalance.service.d/99-brace.conf ExecStart=/usr/bin/mkdir -p /etc/systemd/system/sshd.service.d ExecStart=/usr/bin/sudo -u unpriv /usr/bin/curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/systemd/system/sshd.service.d/local.conf | /usr/bin/tee /etc/systemd/system/sshd.service.d/override.conf ExecStart=/usr/bin/sudo -u unpriv https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/ssh/sshd_config/10-custom.conf | /usr/bin/tee /etc/ssh/sshd_config.d/10-custom.conf ExecStart=/usr/bin/echo 'CtrlAltDelBurstAction=none' >> /etc/systemd/system.conf ExecStart=/usr/bin/systemctl disable systemd-resolved ExecStart=/usr/bin/touch /var/lib/%N.stamp ExecStart=/usr/bin/systemctl --no-block reboot [Install] WantedBy=multi-user.target - name: setsebool.service enabled: true contents: | [Service] Type=oneshot ExecStart=/usr/sbin/setsebool container_use_cephfs off ExecStart=/usr/sbin/setsebool virt_use_nfs off ExecStart=/usr/sbin/setsebool virt_use_samba off RemainAfterExit=yes [Install] WantedBy=multi-user.target - name: docker.service enabled: false - name: fstrim.timer enabled: true - name: systemd-oomd.service enabled: true - name: rpm-ostree-countme.timer enabled: false mask: true - name: sshd.service enabled: false - name: sshd.socket enabled: true storage: files: - path: /etc/zincati/config.d/51-rollout-wariness.toml contents: inline: | [identity] rollout_wariness = 0 - path: /etc/zincati/config.d/55-updates-strategy.toml contents: inline: | [updates] strategy = "immediate" - path: /etc/issue overwrite: true contents: inline: | Authorized uses only. All activity may be monitored and reported. - path: /etc/issue.net overwrite: true contents: inline: | Authorized uses only. All activity may be monitored and reported. - path: /etc/tuned/active_profile overwrite: true contents: inline: | virtual-guest - path: /etc/tuned/profile_mode overwrite: true contents: inline: | manual - path: /etc/systemd/zram-generator.conf overwrite: true contents: inline: | [zram0] zram-fraction = 1 max-zram-size = 8192 compression-algorithm = zstd - path: /etc/security/limits.d/30-disable-coredump.conf overwrite: true contents: inline: | * hard core 0 - path: /etc/ssh/ssh_config.d/10-custom.conf overwrite: true contents: inline: | GSSAPIAuthentication no VerifyHostKeyDNS yes - path: /etc/sysconfig/chronyd overwrite: true contents: inline: | # Command-line options for chronyd OPTIONS="-F 1" - path: /etc/unbound/unbound.conf overwrite: true contents: inline: | server: chroot: "" auto-trust-anchor-file: "/var/lib/unbound/root.key" trust-anchor-signaling: yes root-key-sentinel: yes tls-cert-bundle: /etc/ssl/certs/ca-certificates.crt tls-ciphers: "PROFILE=SYSTEM" hide-http-user-agent: 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 harden-short-bufsize: 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 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.comff - path: /etc/systemd/system/unbound.service.d/override.conf contents: inline: | [Service] MemoryDenyWriteExecute=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=true ProtectProc=invisible 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 links: - path: /etc/localtime target: ../usr/share/zoneinfo/America/New_York - path: /etc/systemd/system/multi-user.target.wants/unbound.service target: /usr/lib/systemd/system/unbound.service - path: /etc/systemd/system/multi-user.target.wants/tuned.service target: /usr/lib/systemd/system/tuned.service - path: /etc/systemd/system/kdump.service target: /dev/null - path: /etc/systemd/system/debug-shell.service target: /dev/null - path: /etc/systemd/system/ctrl-alt-del.target target: /dev/null kernel_arguments: should_exist: - spectre_v2=on - spec_store_bypass_disable=on - l1tf=full,force - mds=full,nosmt - tsx=off - tsx_async_abort=full,nosmt - kvm.nx_huge_pages=force - nosmt=force - l1d_flush=on - mmio_stale_data=full,nosmt - 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 - page_alloc.shuffle=1 - randomize_kstack_offset=on - extra_latent_entropy - debugfs=off