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https://github.com/tommytran732/Linux-Setup-Scripts
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Add unbound systemd hardening
Signed-off-by: Tommy <contact@tommytran.io>
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@ -47,6 +47,42 @@ forward-zone:
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forward-addr: 2001:4860:4860::8888#dns.google
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forward-addr: 2001:4860:4860::8844#dns.google' | 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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ProtectSystem=strict
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RuntimeDirectory=unbound
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ConfigurationDirectory=unbound
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StateDirectory=unbound
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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 restart unbound
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sudo mkdir -p /etc/systemd/system/sshd.service.d
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