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[Unit]
Description=Server to host Syncplay rooms
Documentation=man:syncplay-server(1)
After=network-online.target
Wants=network-online.target
[Service]
Type=simple
DynamicUser=true
# The certbot hook will copy certificates into RuntimeDirectory=, which systemd
# creates at /run/syncplay-server
RuntimeDirectory=syncplay-server
# We must call the certbot hook as root, i.e., prefixed with '!', to copy
# the certificate into /run/syncplay-server. The hook script takes care to set
# permissions to protects the files.
ExecStartPre=!sh -c '. /etc/default/syncplay-server ; RENEWED_DOMAINS=$DOMAIN /etc/letsencrypt/renewal-hooks/deploy/syncplay-server'
# Even if the user does not use certificates, we can unconditionally pass
# '--tls <path>' as syncplay-server does not fail withouth certificates. It will
# log a warning, though.
ExecStart=/usr/bin/syncplay-server --tls /run/syncplay-server
# Security measures
PrivateUsers=true
ProtectClock=true
ProtectHome=true
PrivateDevices=true
ProtectHostname=true
ProtectKernelLogs=true
ProtectKernelModules=true
ProtectKernelTunables=true
ProtectProc=noaccess
LockPersonality=true
MemoryDenyWriteExecute=false
RestrictAddressFamilies=~AF_PACKET
CapabilityBoundingSet=~CAP_NET_ADMIN
CapabilityBoundingSet=~CAP_SYS_MODULE
CapabilityBoundingSet=~CAP_SYS_ADMIN
CapabilityBoundingSet=~CAP_SETUID
CapabilityBoundingSet=~CAP_SETGID
CapabilityBoundingSet=~CAP_SETPCAP
CapabilityBoundingSet=~CAP_SYS_PTRACE
CapabilityBoundingSet=~CAP_CHOWN
CapabilityBoundingSet=~CAP_FSETID
CapabilityBoundingSet=~CAP_SETFCAP
CapabilityBoundingSet=~CAP_FOWNER
CapabilityBoundingSet=~CAP_IPC_OWNER
CapabilityBoundingSet=~CAP_LINUX_IMMUTABLE
CapabilityBoundingSet=~CAP_IPC_LOCK
CapabilityBoundingSet=~CAP_SYS_CHROOT
CapabilityBoundingSet=~CAP_BLOCK_SUSPEND
CapabilityBoundingSet=~CAP_LEASE
CapabilityBoundingSet=~CAP_SYS_PACCT
CapabilityBoundingSet=~CAP_SYS_TTY_CONFIG
CapabilityBoundingSet=~CAP_SYS_BOOT
[Install]
WantedBy=multi-user.target
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