Shadow-Here
Server : Apache/2.4.41 (Ubuntu)
System : Linux cls 5.4.0-216-generic #236-Ubuntu SMP Fri Apr 11 19:53:21 UTC 2025 x86_64
User : iscuser ( 1001)
PHP Version : 7.4.12
Disable Function : shell_exec,pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare,
Directory :  /usr/lib/netdata/conf.d/health.d/

Upload File :
current_dir [ Writeable ] document_root [ Writeable ]

 

Command :
Current File : //usr/lib/netdata/conf.d/health.d/tcp_resets.conf
# you can disable an alarm notification by setting the 'to' line to: silent

# -----------------------------------------------------------------------------

   alarm: ipv4_tcphandshake_last_collected_secs
      on: ipv4.tcphandshake
      os: linux freebsd
   hosts: *
    calc: $now - $last_collected_t
   units: seconds ago
   every: 10s
    warn: $this > (($status >= $WARNING)  ? ($update_every) : ( 5 * $update_every))
    crit: $this > (($status == $CRITICAL) ? ($update_every) : (60 * $update_every))
   delay: up 0 down 5m multiplier 1.5 max 1h
    info: number of seconds since the last successful data collection
      to: sysadmin

# -----------------------------------------------------------------------------
# tcp resets this host sends

   alarm: 1m_ipv4_tcp_resets_sent
      on: ipv4.tcphandshake
      os: linux
   hosts: *
  lookup: average -1m at -10s unaligned absolute of OutRsts
   units: tcp resets/s
   every: 10s
    info: average TCP RESETS this host is sending, over the last minute

   alarm: 10s_ipv4_tcp_resets_sent
      on: ipv4.tcphandshake
      os: linux
   hosts: *
  lookup: average -10s unaligned absolute of OutRsts
   units: tcp resets/s
   every: 10s
    warn: $this > ((($1m_ipv4_tcp_resets_sent < 5)?(5):($1m_ipv4_tcp_resets_sent)) * (($status >= $WARNING)  ? (1) : (20)))
   delay: up 0 down 60m multiplier 1.2 max 2h
 options: no-clear-notification
    info: average TCP RESETS this host is sending, over the last 10 seconds (this can be an indication that a port scan is made, or that a service running on this host has crashed; clear notification for this alarm will not be sent)
      to: sysadmin

# -----------------------------------------------------------------------------
# tcp resets this host receives

   alarm: 1m_ipv4_tcp_resets_received
      on: ipv4.tcphandshake
      os: linux freebsd
   hosts: *
  lookup: average -1m at -10s unaligned absolute of AttemptFails
   units: tcp resets/s
   every: 10s
    info: average TCP RESETS this host is sending, over the last minute

   alarm: 10s_ipv4_tcp_resets_received
      on: ipv4.tcphandshake
      os: linux freebsd
   hosts: *
  lookup: average -10s unaligned absolute of AttemptFails
   units: tcp resets/s
   every: 10s
    warn: $this > ((($1m_ipv4_tcp_resets_received < 5)?(5):($1m_ipv4_tcp_resets_received)) * (($status >= $WARNING)  ? (1) : (10)))
   delay: up 0 down 60m multiplier 1.2 max 2h
 options: no-clear-notification
    info: average TCP RESETS this host is receiving, over the last 10 seconds (this can be an indication that a service this host needs, has crashed; clear notification for this alarm will not be sent)
      to: sysadmin

Samx