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[Unit]
Description=tbaMUD Server
After=network.target
Requires=network.target
[Service]
Type=simple
WorkingDirectory=/var/lib/tbamud
ExecStartPre=/usr/bin/chown -R tbamud:tbamud /var/lib/tbamud
ExecStart=/usr/bin/tbamud -q 4000
Restart=always
RestartSec=5
User=tbamud
Group=tbamud
PermissionsStartOnly=true
# Logging
StandardOutput=journal
StandardError=journal
StandardInput=null
# Networking
RestrictAddressFamilies=AF_INET AF_INET6
IPAccounting=yes
# Filesystem sandbox
ProtectSystem=strict
ProtectHome=yes
PrivateTmp=yes
ProcSubset=pid
ProtectProc=ptraceable
ReadWritePaths=/var/lib/tbamud
# User separation
DynamicUser=no
PrivateUsers=no
# Devices and kernel
PrivateDevices=yes
ProtectKernelTunables=yes
ProtectKernelModules=yes
ProtectKernelLogs=yes
# Capabilities
AmbientCapabilities=CAP_NET_BIND_SERVICE
CapabilityBoundingSet=CAP_NET_BIND_SERVICE
NoNewPrivileges=yes
# Misc hardening
ProtectHostname=yes
ProtectClock=yes
ProtectControlGroups=yes
RestrictNamespaces=yes
LockPersonality=yes
MemoryDenyWriteExecute=yes
RestrictRealtime=yes
RestrictSUIDSGID=yes
RemoveIPC=yes
# System call filtering
SystemCallFilter=@system-service
SystemCallFilter=~@resources @privileged
SystemCallArchitectures=native
# Crash handling via journald/coredumpctl
LimitCORE=infinity
[Install]
WantedBy=multi-user.target
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