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[Unit]
Description=ACME DNS-01 proxy server
After=network-online.target
Wants=network-online.target
StartLimitIntervalSec=14400
StartLimitBurst=10
[Service]
Type=notify
User=dns01proxy
Group=dns01proxy
Environment=XDG_DATA_HOME=/var/lib/dns01proxy
Environment=XDG_CONFIG_HOME=/etc
EnvironmentFile=/etc/dns01proxy/env.conf
ExecStart=/usr/bin/dns01proxy run --config /etc/dns01proxy/dns01proxy.toml
ExecReload=/bin/kill -HUP $MAINPID
# Do not allow the process to be restarted in a tight loop. If the process
# fails to start, something critical needs to be fixed.
Restart=on-abnormal
# Use graceful shutdown with a reasonable timeout.
TimeoutStopSec=5s
LimitNOFILE=1048576
LimitNPROC=512
# Hardening options.
AmbientCapabilities=CAP_NET_BIND_SERVICE
CapabilityBoundingSet=CAP_NET_BIND_SERVICE
DevicePolicy=closed
LockPersonality=true
MemoryAccounting=true
MemoryDenyWriteExecute=true
NoNewPrivileges=true
PrivateDevices=true
PrivateTmp=true
ProcSubset=pid
ProtectClock=true
ProtectControlGroups=true
ProtectHome=true
ProtectHostname=true
ProtectKernelLogs=true
ProtectKernelModules=true
ProtectKernelTunables=true
ProtectProc=invisible
ProtectSystem=strict
RemoveIPC=true
ReadWritePaths=/var/lib/dns01proxy
RestrictNamespaces=true
RestrictRealtime=true
RestrictSUIDSGID=true
[Install]
WantedBy=multi-user.target
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