Configuring notifications in NEMS (or Nagios for that matter) requires a knowledge of what the single-character options mean. Here is an overview:

When you see w,u,c,r,f,n these are the definitions:

• w Notify if in warning state,
• u Notify if in unknown state,
• c Notify if in critical state,
• r Notify if recovered from a previously bad state,
• f Notify if the service is flapping (on and off and on and off)
• n Never notify.

When you see d,u,r,f,s,n these are the definitions:

• d Notify if host is down,
• u Notify if host is unreachable (eg. Internet down),
• r Notify upon recovery,
• f Notify if the host is flapping,
• s Notify if a scheduled service downtime begins or ends,
• n Never notify.