[Unit]
Description=NODE.DC B2 VPS bounded raw TCP relay
After=network-online.target nodedc-b2-backhaul.service
Wants=network-online.target
Requires=nodedc-b2-backhaul.service

[Service]
Type=simple
User=nodedc-relay
Group=nodedc-relay
WorkingDirectory=/opt/nodedc-b2-vps
Environment=DEVICE_EDGE_RELAY_HEALTH_HOST=127.0.0.1
Environment=DEVICE_EDGE_RELAY_HEALTH_PORT=18221
Environment=DEVICE_EDGE_RELAY_INGRESS_ENABLED=true
Environment=DEVICE_EDGE_RELAY_TCP_HOST=0.0.0.0
Environment=DEVICE_EDGE_RELAY_TCP_PORT=9921
Environment=DEVICE_EDGE_RELAY_UPSTREAM_HOST=127.0.0.1
Environment=DEVICE_EDGE_RELAY_UPSTREAM_PORT=19921
Environment=DEVICE_EDGE_RELAY_MAX_SESSIONS=128
Environment=DEVICE_EDGE_RELAY_MAX_SESSIONS_PER_ADDRESS=16
Environment=DEVICE_EDGE_RELAY_MAX_CONNECTIONS_PER_MINUTE_PER_ADDRESS=60
Environment=DEVICE_EDGE_RELAY_MAX_TRACKED_SOURCE_ADDRESSES=4096
Environment=DEVICE_EDGE_RELAY_MAX_BYTES_PER_DIRECTION=67108864
Environment=DEVICE_EDGE_RELAY_SESSION_TIMEOUT_MS=300000
Environment=DEVICE_EDGE_RELAY_SOURCE_POLICY=public-ipv4-only
ExecStart=/opt/nodedc-b2-vps/runtime/node/bin/node /opt/nodedc-b2-vps/services/device-edge-relay/src/server.mjs
Restart=always
RestartSec=3s
NoNewPrivileges=yes
PrivateTmp=yes
PrivateDevices=yes
ProtectSystem=strict
ProtectHome=yes
ProtectKernelTunables=yes
ProtectKernelModules=yes
ProtectControlGroups=yes
RestrictSUIDSGID=yes
LockPersonality=yes
MemoryDenyWriteExecute=no
RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6
SystemCallArchitectures=native
MemoryMax=192M
TasksMax=64
LimitNOFILE=4096
UMask=0077

[Install]
WantedBy=multi-user.target