[Unit]
Description=NGCP Panel Webapp
After=network.target
After=mariadb.service
Requires=network.target
Wants=mariadb.service

[Service]
Type=notify
Environment="HOME=/usr/share/ngcp-panel"
Environment="NPROC=1"
User=www-data
Group=www-data
RuntimeDirectory=fastcgi
RuntimeDirectoryPreserve=yes
PIDFile=/run/fastcgi/ngcp-panel.pid
ExecStart=/usr/share/ngcp-panel/ngcp_panel_fastcgi.pl --listen /run/fastcgi/ngcp-panel.sock --pidfile /run/fastcgi/ngcp-panel.pid --nproc $NPROC

# Service cannot create writable executable memory mappings that are writable and executable at the same time
MemoryDenyWriteExecute=true

# Files + directories not directly associated are made invisible in the /proc/ file system
ProcSubset=pid

# Writes to the hardware clock or system clock will be denied
ProtectClock=true

# Service cannot modify the control group file system (via /sys/fs/cgroup)
ProtectControlGroups=true

# Service has no access to home directories
ProtectHome=true

# Set up new UTS namespace for the executed processes + changing hostname or domainname is prevented
ProtectHostname=true

# Service cannot load or read kernel modules
ProtectKernelModules=true

# Service cannot alter kernel tunables (/proc + /sys)
ProtectKernelTunables=true

# Service has strict read-only access to the OS file hierarchy
ProtectSystem=strict

# Access to the kernel log ring buffer will be denied
ProtectKernelLogs=true

# Processes owned by other users are hidden from /proc/
ProtectProc=invisible

# Service may execute system calls only with native ABI
SystemCallArchitectures=native

# Limit set of capabilities
CapabilityBoundingSet=

# Service process does not receive ambient capabilities
AmbientCapabilities=

# Service has no access to other software's temporary files
PrivateTmp=true

# Service has no access to hardware devices
PrivateDevices=true

# Limit write access
# NOTE: we need r/w access to ngcp-panel/Catalyst tmp folder
ReadWritePaths=/ngcp-data/tmp/www-data/
# NOTE: we need r/w access to /ngcp-data/spool/faxserver for sending fax
ReadWritePaths=-/ngcp-data/spool/faxserver

# Service cannot change ABI personality
LockPersonality=true

# Turn off acquisition of new privileges system-wide
NoNewPrivileges=true

# Service has own user namespace, only root, nobody, and the uid/gid under which the service is running are mapped
# NOTE: we can't have our own user namespace, as we need proper permissions e.g. to /ngcp-data/spool/faxserver
PrivateUsers=false

# Service user cannot leave SysV IPC objects around
# NOTE: service runs as root, so option does not matter
RemoveIPC=true

# Restrict service to allocation of local, ipv4 + ipv6 sockets
RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6

# Restrict access to the various process namespace types the Linux kernel provides
RestrictNamespaces=true

# Service may not acquire realtime scheduling
RestrictRealtime=true

# Attempts to set SUID or SGID bits on files or directories will be denied
RestrictSUIDSGID=true

# Files created by service are accessible only by service's own user by default
UMask=0077

# NOTE: Service needs access to the host's network
PrivateNetwork=false

# Control access to specific device nodes by the executed processes
DevicePolicy=closed

# NOTE: we need network access to e.g. redis server
IPAddressAllow=any

# Maximum number of bytes of memory that may be locked into RAM
LimitMEMLOCK=0

# Restrict system calls that are allowed to be executed
# NOTE: @system-service => reasonable set of system calls used by common system services
SystemCallFilter=@system-service
# NOTE: return with ENOSYS instead of terminating the process immediately
SystemCallErrorNumber=ENOSYS

# All system calls except the listed ones will be logged
SystemCallLog=~@system-service seccomp

[Install]
WantedBy=multi-user.target