# KeepAlive.Probes

Defines how many unacknowledged probes are sent before a connection is considered dead.

This parameter applies to imtcp: TCP Syslog Input Module.

Name:

  KeepAlive.Probes

Scope:

  module, input

Type:

  integer

Default:

  module=0, input=module parameter

Required?:

  no

Introduced:

  at least 5.x, possibly earlier

## Description

The number of unacknowledged probes to send before considering the connection dead and notifying the application layer. The default, 0, means that the operating system defaults are used. This has only effect if keep-alive is enabled. The functionality may not be available on all platforms.

The same-named input parameter can override this module setting.

## Module usage

    module(load="imtcp" keepAlive.probes="...")

## Input usage

    input(type="imtcp" port="514" keepAlive.probes="...")

### Legacy names (for reference)

Historic names/directives for compatibility. Do not use in new configs.

- $InputTCPServerKeepAlive_probes — maps to KeepAlive.Probes (status: legacy)

## See also

See also imtcp: TCP Syslog Input Module.

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