Section heading:
[PortCheck]
Entries:
      PortCheckActive=
      boolean — 'true'
      to switch on, 'false' to switch off.
      SeverityPortCheck=
      severity —
      Severity for events (default is crit).
      PortCheckRequired=
      interface:portlist —
      Services (open ports) that are required.
      PortCheckOptional=
      interface:portlist —
      Services (open ports) that are optional (allowed, but not
      required).
      PortCheckIgnore=
      interface:portlist —
      Services (open ports) that should be ignored (no reports
      for this port).
      PortCheckInterface=
      (list of) IP
      adress(es) — Additional
      interface to scan (up to 15 interfaces).
      PortCheckInterval=
      seconds — Interval
      between checks (default 300).
      PortCheckUDP=
      boolean — Whether
      to scan UDP ports as well (default yes).
      PortCheckMinPort=
      integer — The
      lowest port to be checked (defaults to 0).
      PortCheckMaxPort=
      integer — The
      highest port to be checked (defaults to 65535).