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Add unbound systemd hardening

Signed-off-by: Tommy <contact@tommytran.io>
This commit is contained in:
Tommy 2023-01-25 08:17:29 -05:00
parent 565ff45b1a
commit 7448b986f8
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@ -46,7 +46,43 @@ forward-zone:
forward-addr: 8.8.4.4#dns.google forward-addr: 8.8.4.4#dns.google
forward-addr: 2001:4860:4860::8888#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 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 systemctl restart unbound
sudo mkdir -p /etc/systemd/system/sshd.service.d sudo mkdir -p /etc/systemd/system/sshd.service.d