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Smokeping_probes_TCPPing(3)	   SmokePing	   Smokeping_probes_TCPPing(3)

NAME
       Smokeping::probes::TCPPing - TCPPing Probe for SmokePing

SYNOPSIS
	*** Probes ***

	+TCPPing

	binary = /usr/bin/tcpping # mandatory
	forks =	5
	offset = 50%
	step = 300
	timeout	= 15

	# The following	variables can be overridden in each target section
	pings =	5
	port = 80

	# [...]

	*** Targets ***

	probe =	TCPPing	# if this should be the	default	probe

	# [...]

	+ mytarget
	# probe	= TCPPing # if the default probe is something else
	host = my.host
	pings =	5
	port = 80

DESCRIPTION
       Integrates TCPPing as a probe into smokeping. The variable binary must
       point to	your copy of the TCPPing program. If it	is not installed on
       your system yet,	you can	get it from
       http://www.vdberg.org/~richard/tcpping.	You can	also get it from
       http://www.darkskies.za.net/~norman/scripts/tcpping.

       The (optional) port option lets you configure the port for the pings
       sent.  The TCPPing manpage has the following to say on this topic:

       The problem is that with	the widespread use of firewalls	on the modern
       Internet, many of the packets that traceroute(8)	sends out end up being
       filtered, making	it impossible to completely trace the path to the
       destination.  However, in many cases, these firewalls will permit
       inbound TCP packets to specific ports that hosts	sitting	behind the
       firewall	are listening for connections on.  By sending out TCP SYN
       packets instead of UDP or ICMP ECHO packets, tcptraceroute is able to
       bypass the most common firewall filters.

       It is worth noting that tcptraceroute never completely establishes a
       TCP connection with the destination host. If the	host is	not listening
       for incoming connections, it will respond with an RST indicating	that
       the port	is closed. If the host instead responds	with a SYN|ACK,	the
       port is known to	be open, and an	RST is sent by the kernel
       tcptraceroute is	running	on to tear down	the connection without
       completing three-way handshake. This is the same	half-open scanning
       technique that nmap(1) uses when	passed the -sS flag.

VARIABLES
       Supported probe-specific	variables:

       binary
	   The location	of your	tcpping	script.

	   Example value: /usr/bin/tcpping

	   This	setting	is mandatory.

       forks
	   Run this many concurrent processes at maximum

	   Example value: 5

	   Default value: 5

       offset
	   If you run many probes concurrently you may want to prevent them
	   from	hitting	your network all at the	same time. Using the probe-
	   specific offset parameter you can change the	point in time when
	   each	probe will be run. Offset is specified in % of total interval,
	   or alternatively as 'random', and the offset	from the 'General'
	   section is used if nothing is specified here. Note that this	does
	   NOT influence the rrds itself, it is	just a matter of when data
	   acqusition is initiated.  (This variable is only applicable if the
	   variable 'concurrentprobes' is set in the 'General' section.)

	   Example value: 50%

       step
	   Duration of the base	interval that this probe should	use, if
	   different from the one specified in the 'Database' section. Note
	   that	the step in the	RRD files is fixed when	they are originally
	   generated, and if you change	the step parameter afterwards, you'll
	   have	to delete the old RRD files or somehow convert them. (This
	   variable is only applicable if the variable 'concurrentprobes' is
	   set in the 'General'	section.)

	   Example value: 300

       timeout
	   How long a single 'ping' takes at maximum

	   Example value: 15

	   Default value: 5

       Supported target-specific variables:

       pings
	   How many pings should be sent to each target, if different from the
	   global value	specified in the Database section. Note	that the
	   number of pings in the RRD files is fixed when they are originally
	   generated, and if you change	this parameter afterwards, you'll have
	   to delete the old RRD files or somehow convert them.

	   Example value: 5

       port
	   The TCP port	the probe should measure.

	   Example value: 80

AUTHORS
       Norman Rasmussen	<norman@rasmussen.co.za> Patched for Smokeping 2.x
       compatibility by	Anton Chernev <maznio@doom.bg>

2.7.3				  2020-08-30	   Smokeping_probes_TCPPing(3)

NAME | SYNOPSIS | DESCRIPTION | VARIABLES | AUTHORS

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