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RFC: harden systemd service with safe defaults #800

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23 changes: 23 additions & 0 deletions packaging/systemd/rsync.service
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Original file line number Diff line number Diff line change
Expand Up @@ -25,8 +25,31 @@ Restart=on-failure

ProtectSystem=full
#ProtectHome=on|off|read-only

# These are general hardening parameters that should not affect file access
PrivateDevices=on
NoNewPrivileges=on
MemoryDenyWriteExecute=on
LockPersonality=on
PrivateTmp=on
ProtectClock=on
ProtectControlGroups=on
ProtectHostname=on
ProtectKernelLogs=on
ProtectKernelModules=on
ProtectKernelTunables=on
ProtectProc=invisible
ProcSubset=pid
RestrictNamespaces=on
RestrictRealtime=on
SystemCallArchitectures=native
SystemCallErrorNumber=EPERM
SystemCallFilter=@system-service

# We only listen on TCP sockets
SocketBindAllow=ipv4:tcp
SocketBindAllow=ipv6:tcp
SocketBindDeny=any

[Install]
WantedBy=multi-user.target
24 changes: 24 additions & 0 deletions packaging/systemd/[email protected]
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Expand Up @@ -24,5 +24,29 @@ StandardError=journal

ProtectSystem=full
#ProtectHome=on|off|read-only

# These are general hardening parameters that should not affect file access
PrivateDevices=on
NoNewPrivileges=on
MemoryDenyWriteExecute=on
LockPersonality=on
PrivateTmp=on
ProtectClock=on
ProtectControlGroups=on
ProtectHostname=on
ProtectKernelLogs=on
ProtectKernelModules=on
ProtectKernelTunables=on
ProtectProc=invisible
ProcSubset=pid
RestrictNamespaces=on
RestrictRealtime=on
SystemCallArchitectures=native
SystemCallErrorNumber=EPERM
SystemCallFilter=@system-service

# These settings work only for inetd-style activation
RestrictAddressFamilies=AF_UNIX
PrivateNetwork=on
IPAddressDeny=any